Taipan Veteran - testing mods and few bullet types

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Had some time today so thought I'd do some testing with my .25 Vet. One PP and extensively reworked/polished air ports - reworked trigger, smooth as silk now and the lightest pull possible (Taipan has the best trigger of any gun - period). Hammer spring mod is awesome, elongated a TT spring by .10mm - settled to about 8mm and added a buffer to help reduce any loss of air due to spring kickback after firing - surprised at how well this combination has worked. The gun has a LW polygonal barrel, crowned and lapped - testing today with AVS .253 HP/BT's in 46gr and some .218 Griffin 48gr. The AVS's, the .003 over fits the barrel better, like the slopped nose of the bullet and they do shoot very well but the Griffin is a bit more accurate - I'm doing nickels at 75yrds with the Griffin's - Quarter's with the AVS's - (both arguably better if I had a proper benchrest). Still trying to dial in the fps while trying to maintain highest possible fpe. attached chart shows my progress thus far....getting there (data in column F is my Vet .22 compact with a 18in. polygonal barrel). The addition of my steel ball bearing ballistic tip did improved accuracy but not by much - it did make a huge difference in that hard hitting thud when the bullet struck the target. The two bullets on the left are AVS 46's - one on the right is the Griffin 48. Waiting for some 48gr AVS's for a proper comparison but the barrel does seem to like the 48s.

20220929_123213.jpg20220929_125443.jpg

Will be doing some moderator testing next week of two - DonnyFL vs Silent Thunder Ordnance - and can tell you now, the STO's will win by 10miles or more. I challenge anyone to look and compare (and try to understand) the technical information on Donny or any manufacture's website that sells moderators as compared to STO. Yes, the difference in sound suppression performance is that decisive. As for weight, STO wins again....not a hater's and I own a few DonnyFL's but they are bricks as compared to the STO's.. Already had the STO Falx and Sarissa - just received the Accipiter in the mail and OMG, that thing is feather light - no joke. but we're gonna test anyway just to confirm the numbers. The Ronin will be headed to ebay here shortly. Will say, the internal felt stuff Donny uses ain't all that good - I tried several dozen different baffle, media combinations and was able to lower the sound suppression performance of the Ronin by a least 5db.
 
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jwrabbit123 said:
the taipan also has a very quiet oem baffle system also , I own a few in 22 and 25 , mine shoot best with .216 in .22 cal and in ,25 cal .249 . what is your extreme spread and shot count ?
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Right now, trying to sort out the different spring/damper - spring tension settings and regulator settings. Have some AVS 48gr HP/BTs on order - good results with these previously, - running tethered at the moment, will tune to shot count soon as I get this part of it sorted out. So far, Griffin 48's @ 900 or so fps is netting 10 shot quarter-size groups at 75yrds. previously the same 48gr AVS netted 15-20 more fps than the Griffins - different nose profile so wanted to test more with these. Only shoot Boat Tails - (haven't tried cup/dish types) but none below 46gr have tested well in the polygonal barrel. Problem is, the 50gr is about the max bullet length due to the Taipan magazine. Sure wish you could run the Taipan off an attached bottle as opposed to tethering - love the .25 but its an air hog.


in .22, same mods & same LW polygonal barrel - 18". - .223 dish (only because AVS doesn't make BTs at the moment) - and Griffin doesn't make anything in .223. Shooting nickels @ 75yrds at 900fps. not dialed in for shot count though. Its my nighttime pest rig.


Note: the oem Taipan shroud/baffle is quite good but can be made to work much better. I've tried so many different baffle arraignments and different media types in it...I've already lowered the oem sound suppression by over 5-7db - have some different sound suppression media on order so will see how that works.
 
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I have a .22 cal with a CZ barrel in std length , and I also have a slug barrel with rounded rifling I threaded to 1/2 20 and made a nut if i want to use the oem shroud or to use with just a moderator , my slug barrel is around 23 inches .
Now my 25 cal is the std version I think a lw barrel and I also got a slug barrel like 23 inches which here is specs and on website those actually my test targets before I got it dialed in with my best ammo ,


https://airgunheaven.com/en/taipan-veteran-610mm-slug-barrel-25

I do my own crowning and barrel work and I also swaged and casted my own ammo for decades , I dont know if you have tried the MP slugs in your unchoked slug barrels , but they great , The 22 cal come in at 34 to 36 grains and the 25 cal 48 51 gr depending on alloy mix,
I have done alot of testing years ago with crowns and different slugs and found the13 degree is king for me with slugs and no choke , I have tested 5 types and barnds of barrels in taipans , I also have mods on both like power plenums thumb power adjustment , I shoot
them both barrels depending on a hunt or targets , I havent shot them in a bit as latley I been using my shorties and out hunting squirrels in .22 cal and for me carrying a gun in woods I prefer my leshiy1 or my evol mini with folding stock , but the taipans great guns .
so here is the mp slugs I like best for them taipans have you shot them >???

pslug22.png

Here is my 22 cal with slug barrel with donny fl and my PM@ scope

and a few 50 and 100 yard slug groups LOU




taipan22slugbarrel.JPG

taipan mp slugs 36 gr 50 yd.jpg
1022201714.jpg

50 yds MP 34 gr.jpg
 
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KMoses said:
Will be doing some moderator testing next week of two - DonnyFL vs Silent Thunder Ordnance - and can tell you now, the STO's will win by 10miles or more. I challenge anyone to look and compare (and try to understand) the technical information on Donny or any manufacture's website that sells moderators as compared to STO. Yes, the difference in sound suppression performance is that decisive. As for weight, STO wins again....not a hater's and I own a few DonnyFL's but they are bricks as compared to the STO's.. Already had the STO Falx and Sarissa - just received the Accipiter in the mail and OMG, that thing is feather light - no joke.
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KMoses

How has your testing gone with the STO moderators? Which of the 3 STOs the Falx, Sarissa and Accipiter is the quietest? Which one do you like the best (Accipiter because it is lightest, etc)?

Trying to quieten it down as I have some sensitive neighbors.


-PJ
 
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Barrel shroud back from the machine shop - veteran long shroud on a vet standard, need a longer shroud to clear the 24in. poly barrel. Now some testing....AVS .254 48gr and 50gr. (HP/BTs). Both shoot exceptionally well, both the regulator & hammer spring maxed out - getting 990fps with the 48gr and 960fps with the 50's. Shot count is low as can be expected but I'm going for fast, long reaching & hard hitting. Question to any tuners out there....to gain at least some air efficiency, which matters more - lower regulator pressure or lower spring pressure? I can live with say, 900fps but where can i gain the most efficiency? dropping the reg or less hammer? Same 48 or 50gr slug.

Pic is 20 shots - 50gr @ 75yrds - can do the same with the 48's - few low flyers where I fell off the regulator.... to gain accuracy, I did re-crown and hand lap the barrels. Re-working the barrel has proven to the single most/best improvement made.

Next up, soon as I can finds a good day....a bit of Moderator testing, just ordered a Huggett Astille (1 extension tube) & have a Huggett Snipe - Silent Thunder Ordnance Flax & a Sarissa - DonnyFL Sumo - and a DIY baffle system inside a STO Sarissa/Accipiter tube

27in slug barrel (12 lands) from AirgunHeaven - thinking about selling that one, a bit too long and prefer the poly barrel - think its headed to ebay with a few scopes and misc. .25 slugs now that I'm down to the 48 vs the 50 debate

Welcome comments - advice on the reg vs spring question

20221114_103809.jpg
 
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PelletJunkie said:
KMoses

How has your testing gone with the STO moderators? Which of the 3 STOs the Falx, Sarissa and Accipiter is the quietest? Which one do you like the best (Accipiter because it is lightest, etc)?

Trying to quieten it down as I have some sensitive neighbors.


-PJ
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Sorry I'm just getting back - doing some moderator testing in the next few weeks. Of the STO tubes, the Flax is on my .22 - with the Sarissa on my .25 so different applications. Both work very well - less db with the Sarissa. Will say, they work best with a shroud/baffle system - they seem to need something to strip off that initial blast of air before they can work to good effect. The Accipiter, is basically a Sarissa made from lighter materiel - tube is Derlin and baffle system inside is over 50percent lighter. That said, i blew it up. Not sure how, maybe air pressure was too high or idk - but it was not bullet clipping. talked to STO, agreed to send me a standard Sarissa vs another Accipiter - great customer service. Used the Accipiter tube to make a DIY moderator, baffle system was destroyed - will be testing that next week or so. of the two, the weight savings of the Accipiter is nice but I prefer the standard Sarissa, its much more robust and only marginally heavier. Just ordered a Huggett Astille so will see how that works out. Also have a DonnyFL Sumo and had a Ronin but the Ronin died as sad death - that one did die from clipping, new barrel - poorly machined crown (fixed now). As for the Donny cans, the Ronin works ok but honestly not a huge fan of DonnyFL's, too heavy. When i was using the Ronin, i replaced the Donny felt with my stuff and it was much better by far - but, my DIY can still works better. So far, of all the cans I've used the STO's are the best but....cant wait to test that Astille soon as the mail guy drops it off.
 
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peaceful_ruler said:
How do the Compact and Standard Veterans handle slugs as well?
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peaceful_ruler said:
- just getting back on here.... I replaced the barrels on both my .22 and .25 Vets with LW Polygonal barrels. As i recall, they both CZ barrels worked well with slugs and i did test several types (Dish, Cup base but have stuck with HP/BT's) - AVS slugs tend to travel about 20-30fps faster than the same in Griffin, though i did find that shooting BT's - the heavier ones do shoot better, least in my poly barrels. Will say, the CZ barrels are great barrels, equal to or better than TJs - i just prefer the poly.
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jwrabbit123 said:
the taipan also has a very quiet oem baffle system also , I own a few in 22 and 25 , mine shoot best with .216 in .22 cal and in ,25 cal .249 . what is your extreme spread and shot count ?
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- just getting back on here.....spread on both is virtually nil - both guns are capable of stacking pellets - I've found that any spread is almost always due to me screwing up. I'm shooting .254 AVS HP/BTs in 48gr. The oem baffles are good but adding a 24in. barrel - I had to shorten the oem shroud/baffles to accommodate which meant a DIY baffle system- the DIY works equally well.
 
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peaceful_ruler said:
How do the Compact and Standard Veterans handle slugs as well?
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Toug to make power with shorter barrels. My 25 long factory barrel likes the .253 AVS respectable at slow mid 800 FPS. Due to my reg creeping. Have heavy hammer spring coming and a huma set at 155 bar. I expect better when I get to test it. Note - factory reg was creeping, replaced with new huma.
 
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igolfat8 said:
Would you care to share what medias you are experimenting with?
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Too early to say, need to do more testing to confirm what works best - then, single media or multi-media configuration, number of cells etc. Testing several different types - different configurations. Not difficult to improve over the DonnyFL tube designs, nothing crazy there but the STO, now that's a different animal - equaling STO is my goal at the moment.
 
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rangur1 said:
Toug to make power with shorter barrels. My 25 long factory barrel likes the .253 AVS respectable at slow mid 800 FPS. Due to my reg creeping. Have heavy hammer spring coming and a huma set at 155 bar. I expect better when I get to test it. Note - factory reg was creeping, replaced with new huma.
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Huma is a darn good reg. I replaced both Taipans regs with Huma - had to rebuild one, great customer support from Huma. I use a lengthened Hammer spring, can't recall if it started out as an ER or TT spring, I've used both. Porting/Polishing your air transfer ports will help - and addition of a PP will definitely help. I also shimmed my valve return spring which seemed to help - hard to say, that one but its still set up that way today. I did find that any more than a single PP offers no additional benefit - least none I have seen. And, reworking the trigger does wonders. Anyway, good luck on your quest - it can get addictive - love the Taipan platform.
 
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KMoses said:
Huma is a darn good reg. I replaced both Taipans regs with Huma - had to rebuild one, great customer support from Huma. I use a lengthened Hammer spring, can't recall if it started out as an ER or TT spring, I've used both. Porting/Polishing your air transfer ports will help - and addition of a PP will definitely help. I also shimmed my valve return spring which seemed to help - hard to say, that one but its still set up that way today. I did find that any more than a single PP offers no additional benefit - least none I have seen. And, reworking the trigger does wonders. Anyway, good luck on your quest - it can get addictive - love the Taipan platform.
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I have the power plenum installed , first thing I do with a taipan, along with a Donnyfl speed HS adjuster. essential must haves.
 
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