Firing pin stop question

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Firing pin stop question

Post by wizzer on Thu Dec 14, 2017 9:02 am

Do any 1911 shooters modify the radius on their stops these days to change the recoil characteristics or is this a thing of the past?

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Re: Firing pin stop question

Post by robert84010 on Thu Dec 14, 2017 9:28 am

I doubt many modify them since you can tune via recoil spring and mainspring. I think most builders use the standard radius block but some might use the short radius block for carry pistols using +P ammo. With hardball not requiring 230gr @ 825fps  there is little need for a short radius block on a bullseye pistol. Maybe the actual builders here will speak about what they use and why.

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Re: Firing pin stop question

Post by kc.crawford.7 on Thu Dec 14, 2017 10:04 am

It depends on the caliber, load and the individual.  I use a small radius firing pin stop all the time.  You just have to know what results you're looking for and if that firing pin stop can help achieve those results.
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Re: Firing pin stop question

Post by troystaten on Thu Dec 14, 2017 10:53 am

My wad gun that was put together by Dave Salyer has a heavily radiused, it also has a very light recoil spring.

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Re: Firing pin stop question

Post by SmokinNJokin on Sat Dec 16, 2017 6:10 am

I have a heavily radiused firing pin stop and relieved hammer, I also shoot very light loads, and irons only so lightweight slide. I use a 16lb spring for proper ejection with 185 jacketed @775 fps, the recoil is much more pronounced that it was with the squared stop but I only use that ammo for the long line @ military matches so no big deal. 99% of the ammunition I shoot is lead short line loads so I set the gun up to run that best.

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Re: Firing pin stop question

Post by troystaten on Sat Dec 16, 2017 11:24 am

I should have also mentioned that my wad gun has a full length rib and a dot sight. I believe the rib is aluminum and the recoil spring is 7 or 8 pounds.

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Re: Firing pin stop question

Post by Jon Eulette on Sat Dec 16, 2017 12:03 pm

troystaten wrote:I should have also mentioned that my wad gun has a full length rib and a dot sight. I believe the rib is aluminum and the recoil spring is 7 or 8 pounds.

In my experience recoil spring weight that low with 50 yd loads has a tendency to open the groups way up. At 25 yds not as noticeable. 10# is typically the lightest spring weight I use on any pistols I build or repair. So if your groups are big I would bump the spring up to a 10#. 
I know many people out there believe based on video that bullet is out of the barrel before the pistol starts cycling......blah blah blah. All I know that from hand with good ammunition and a great pistol being shot by a HM that they 99% of the time shoot like crap when the recoil spring is too light. Firing pin stop is only one part of the equation as KC mentioned. Barrel fit is majority contributer to accuracy and felt recoil. Firing pin stop can be a bandaid or small part of the marriage.....
My 2 cents.
Jon
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Re: Firing pin stop question

Post by troystaten on Sat Dec 16, 2017 12:21 pm

Thanks Jon, as much as I would like to blame the gun and ammo for my 50 yard groups I think it's the clown holding the grips.  I really do appreciate all of your posts and knowledge, you are fortunate to be in SoCAL if you where up here in NorCal I would be a real pest.  Have a merry Christmas.

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Re: Firing pin stop question

Post by Jon Eulette on Sat Dec 16, 2017 12:24 pm

That's funny. I wasn't implying anything about your shooting Smile
Just keep working at it.
Jon
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Re: Firing pin stop question

Post by troystaten on Sat Dec 16, 2017 1:02 pm

Jon shooting the pistol is a funny thing, sometimes I think I am reasonably competent and the next time out to the range the dot on my wad gun is bouncing all over the place and the bullets are going everywhere.  I am definitely more consistent with my 22 but even with that there is probably a 10% variation on my scores.

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Re: Firing pin stop question

Post by wizzer on Sat Dec 16, 2017 1:08 pm

"QUOTE"  Barrel fit is majority contributer to accuracy and felt recoil


I understand the accuracy part.  Would you please comment on the felt recoil portion?

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Re: Firing pin stop question

Post by Jon Eulette on Sat Dec 16, 2017 1:27 pm

Barrel fit can keep pistol in battery longer. The longer you can keep in battery the slower the slide velocity to the rear. It's just delaying/lessening the slide speed. 
Jon
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