I bought a Winchester 70-45 on eBay,,
- Thread starter kevinalt53
- Start date
These Winchesters were not received very well by the general public due to QC issues. If you can improve on the design, make it reliable and bulletproof you may have a lot of business ahead for yourself. Good luck and please keep us informed.
Dennis
Dennis
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Yeah I would never pay 800 bucks for this , the seller on eBay even refunded me another 130 bucks cause of the valve stem so I’m in 270 bucks . All my other guns are airforce, extreme big bore, an xp. It’s basically a Evanix rain storm,, the valve stem in all of them are flawed cause of the oring groove in the stem . The stem is 3 mm so the groove is probably only about 1 an half mm. I’ve read post back from 2013 so it’s be going this long an still no solution.. I’m gonna just do away with the oring an use 4 mm pin . It will probably leak a little on every shot but don’t think it will be enough to matter on a big bore. Thanks for commenting
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So I made the valve stem for the rifle an the Teflon was to soft so got som delrin an made one from it an it works flawless so far with about 50 shots through it,,,it’s almost impossible to get parts for this gun so if someone els needs a valve stem made hit me up an I can help you out,,,
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You will probably be remaking that poppet again, next time use PEEK, it seems to be a better material and every rifle I've used it on... that was never a problem again.
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X2,
PEEK is much better suited for valve parts . The downside is it’s a little tricky to get to seal up and the price is kinda hard to swallow it is after all plastic .
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Will Piatt tuned mine and was only able to hit 200fpe for 3 shots, with 155gr Mr Hollowpoint ammo. Still good enough for whitetail where I live, but pretty disappointing overall.
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Yeah I finally finished everything up on it an I can only achieve 217 fpe with 150 cast pellets but I can shoot 6 straight shots with an extreme spread of 10 witch is awesome,, however I can achieve 245 fpe with 350 gr nsa slugs but I like have the mag being it’s the only mag gun I have.. for one it’s only a 20 inch barrel an the valve body has very little space to hold air an also the hammer stroke is short with that being said it’s a hard gun to get a lot of power out of,, but like you said it will kill a deer but I would definitely keep it within 50 yards
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Do yourself a favour , get in touch with TJ’s and get yourself a 28” barrel or longer . The short barrel in theses guns are really robbing available power from the valve and port size . Another thing is to double up on the hammer spring , with the sidelever a relatively stiff spring setup still work s well .
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I would like to get a longer barrel but then it would need a longer shroud to ,, thinking on getting a nice 28 in blued barrel an have a new barrel clamp made
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Well I did some crony testing an took it to the range today an I’m very happy with the results,, I can get 217 fpe with the 150 gr pellets at 800 fps with the hammer tension all the way up but it’s a high spread 7 to 8 shots so backed hammer tension down about a quarter an can get 7 to 8 shots with an extreme spread of 11 starting at 760 fps an that’s great for a unregulated big bore so I’m gonna leave it there.. however I can also squeeze a nsa 350 gr in it to an achieve around 250 fpe if I wanted to but I like the mag an want to use it..but I started out at 50 yards an the fist group was about an inch so I started recording an of course it opened up to 2 inches but I noticed a lot of deformed pellets so picked out some good ones an shot a group 1 an half in at 50 ... so moved target out to 100 an shot 2 1 an half in groups at 100 an was really surprised so stared setting up some reactive targets up a 100 an was blasting them on the first shot ,, it’s putting out around the same power as my 909 but the Sam ya
ng could never achieve 1 an half in groups at 100 so I’m very happy with results....
ng could never achieve 1 an half in groups at 100 so I’m very happy with results....
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Another option for a long barrel would be to get some tubing and have it threaded to match . Pretty sure it’s m22x1 on both ends . That is some good power for such a short barrel . Keep an eye on the cocking lever , they have been known to bend under big power .
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I have one of these. After it's first outing it developed a massive leak. That was a year ago, I couldn't get parts. Finally sent it to Will Piatt and got a VM the other day to call, I think it's probably done.
I was shooting the 155 Mr Hollowpoints with it.
Hoping it'll come back delivering 200fpe. W/ an NV scope it'd be perfect for popping deer out my upstairs window. I have a moderator for it too that Neil Clague (sp?) made for it. Pretty quiet.
Overall, not all that impressed, but it'll do for now.
I was shooting the 155 Mr Hollowpoints with it.
Hoping it'll come back delivering 200fpe. W/ an NV scope it'd be perfect for popping deer out my upstairs window. I have a moderator for it too that Neil Clague (sp?) made for it. Pretty quiet.
Overall, not all that impressed, but it'll do for now.
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Cool ,,, yeah around 200 fpe is about all u can get out of theese guns with slugs that can fit in mag,, it can achieve 250 with 350 gr nsa . But I actually love the gun , love the stock an how consistent it is an 200 fpe is decent power for a small package
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Just got my Winchester .45 back. Will Piatt has it running at 215fpe for 3 shots from 200bar. Trigger is nice and light. I put a Helos on it and started sighting it in before it got dark. Seems to be running well. Need to find a good deal on a NV scope.
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That’s great, glad all went well, 215 fpe is good from a 20 inch barrel an a small package rifle. I want to put a swivel studs in stock on mine so I can use a sling but I just can bring myself to drill holes in that beautiful stock,,lol
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Hi Kevinalt53,
Do you still manufacture your upgraded version of the valve stem for the Winchester Model 70-45? If so, could I purchase a couple of them from you?
Do you still manufacture your upgraded version of the valve stem for the Winchester Model 70-45? If so, could I purchase a couple of them from you?
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