Benjamin Bulldog 290fpe Beast Mode

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thammer

thammer

Member
Jun 8, 2015
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Ohio, United States
Bulldog Beast Mode

290fpe 3 shots 16fps extreme spread. 

145gr Noslers ran 948, 960, 944 fps

Opened up the transfer port size to 5/16", Reshaped the poppet head and removed the return spring. Shortened the factory hammer spring to 2.4", added a 10.5 gram brass hammer weight .400" in height and put a gauntlet spring inside the factory spring. Filled the guns upgraded airtube to 3650psi and fired 3 shots with Benjamin Nosler 145gr slugs.



Do not fill a factory air tube beyond 3000psi.



https://youtu.be/4jadcvRNNQA


 
Has anyone tried the all copper controlled fracturing bullet by Lehigh Defense? It's fits the stock magazine and is my first purchase after I order a Pitbull. lehighdefense.com/all/357cal-38cal-105gr-controlled-fracturing-bullet
Click to expand...

They are machined brass and copper,$40 for 50 rounds and will probably damage our soft steel air rifle barrels.Alot of friction for our low psi airguns.
 
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Actually, the .355 version WILL shoot in a modified Bulldog (a Pitbull) especially if you coat it with the John Deer Graphite Lubricant. Two coats.

https://www.lehighdefense.com/index.php?_route_=all/355cal-9mm-105gr-controlled-fracturing-bullet

https://greenfarmparts.com/shop/john-deere-lubricant-spray-ty25797/?gclid=EAIaIQobChMIouGV2Pzf5wIVA6SzCh2bzAbFEAQYASABEgJa0vD_BwE

I've only shot it from a full fill and then only two shots (sort of afraid of a stuck bullet at lower pressure) but did get acceptable/expected velocities and 1/2" to 5/8" 'groups' (shot two, refill n shot two three times for a six shot 'group') I shot 30 shots in my testing with these bullets and don't think there is any barrel damage.... Honestly, for a lot of years I said it couldn't be done and we could only shoot soft lead projectiles so when UpNorthAirgunner did his videos I had to test it for myself.

Note this was at 50 yards but most of my hunting is 85 yards or less so I thought it was good. I also fill to 3200 which is an overfill but since I noticed a 3000 fill at 72 degrees goes to 3400 at 90 degrees in the afternoon I "evaluated the risk and safety factors" and believed the engineers designed the gun to allow for a cool morning fill and the increase in pressure as the day warmed. You have to decide for yourself if that's an acceptable safety risk.
 
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I gave my Pitbull to Veradium Air to convert it to a Taurus. I do have the Pitbull reinforced cocking handle and their 'blue spring's but I already had Veradium's extended tube so going the rest of the way to the Taurus isn't hard.

Hers a link to their webpage

https://www.veradiumair.com/term_1.html

Yes, I am OK losing the moderator (I had the Mega and FYI it cracked BUT Pitbull replaced it with the lifetime warranty no problem). If I do need a moderator, Brian at Veridium has one he makes where you screw off the brake and screw on the moderator. Like other screw on moderator it makes it a bit longer but that's true with most of them.
 
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Well, Brian hasn't told me what all he's doing inside the Bulldogs but I meet up with him last month and saw the performance and he's doing something right. My suggestion is to call him, he's easy to talk to.

Also, he recently moved his shop from Portland due to the riots and liberal culture and is now in Texas just south of Beaumont (and here comes the second hurricane since he's got here). Note that he's in the shop practically full time 7 days a week n 14 or 15 hours a day setting up and fulfilling work on customers guns and he's got a waiting list delay of about 3 weeks right now due to demand.

He's just got a new lathe in this week (American made he told me) just for doing the threading on extended tanks too so those will be coming out soon.

Hope he catches up soon, he's building a .357 pistol for me using a WARP that I had and converting the action to take Bulldog magazines. All the CAD design work is done, all he needs to do is machine it. He's got a .357 FLEX (the prototype, converted from .25) of mine he's done the same conversion on also, it's all machined and just needs coating on the shiny aluminum surfaces and he'll ship it back. However, I told him to get the backlog from the other customers cleared first before he gets back to my experimental stuff.
 
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Well, Brian hasn't told me what all he's doing inside the Bulldogs but I meet up with him last month and saw the performance and he's doing something right. My suggestion is to call him, he's easy to talk to.

Also, he recently moved his shop from Portland due to the riots and liberal culture and is now in Texas just south of Beaumont (and here comes the second hurricane since he's got here). Note that he's in the shop practically full time 7 days a week n 14 or 15 hours a day setting up and fulfilling work on customers guns and he's got a waiting list delay of about 3 weeks right now due to demand.

He's just got a new lathe in this week (American made he told me) just for doing the threading on extended tanks too so those will be coming out soon.

Hope he catches up soon, he's building a .357 pistol for me using a WARP that I had and converting the action to take Bulldog magazines. All the CAD design work is done, all he needs to do is machine it. He's got a .357 FLEX (the prototype, converted from .25) of mine he's done the same conversion on also, it's all machined and just needs coating on the shiny aluminum surfaces and he'll ship it back. However, I told him to get the backlog from the other customers cleared first before he gets back to my experimental stuff.
Click to expand...

Glad to hear he is settled in. It has been several weeks since I've talked with him. One of my Bulldogs is in his hands and very similar to your work from the standpoint of no real rush and being a somewhat experimental/one-off build. It should be pretty interesting once complete.
 
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Key Kinetic45, Did you ever get your Taurus? If so, please tell us more about it and maybe make a video.

As I asked above, I am wondering about the long term durability of the plastic stock and of course components but to a lesser degree.

What is your take? Will these things last? 

My top choice is the Slayer, if I can get my hands on one. If not, I may need to go with a modded dog, but I really want to feel that it will last.
 
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Yes, I got it back from Brian, then we were brainstorming and decided to experiment with some different accuracy mods so I gave it back to him. But he's doing regular customers guns FIRST before 'playing' with new ideas so I'm patiently waiting as proper.

I've got two Slayers and I absolutely love them but getting anything from AAA / Tom Costan is a trial, takes many months to years to get your order. Keep an eye out for a used one is maybe quicker.

On the Bulldog stock, it's held up quite well for me getting bumped and banged in and out of vehicles and out hunting BUT I and other people have had problems with the holding screws threaded nut coming out. There's a better one you can have Brian put in, never had a problem after that.

I have run a Hogue grip cover on my Bulldog / Pitbull / Tarus as it evolved because the regular plastic grip surface sucks.

Highly recommend getting a JSAR or Pitbull stronger replacement cocking handle because the factory handles bend pretty often.

Like this: https://www.hogueinc.com/grips/handall-grip-sleeves/sleeve/handall-universal-full-size-grip-sleeve-fde
 
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Thanks for that insight. I have had an email from Tom, but have not been able to talk with him yet and sus out the possibility of actually getting one. Where would I find a used Slayer? I have not found anything in multiple searches.

With your Taurus, how was the accuracy when it came back to you? Did the carbon shroud help much compared to the Pitbull supports? I have read that the twist rate in the barrel could be better and have thought that perhaps re-barrelling might improve it.

In regards to the Pitbulls vs the Veradium, there are features of each of them that I really like. I wish there were more reviews and info out there to be better informed.


 
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