Tight Then Loose

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Tight Then Loose

Postby 1911A45ACP on Sun Nov 24, 2019 10:23 pm

What's up with that. I shoot my military surplus rifles and with some of them I get tight groups. But with each subsequent 5 shot group they start to open up. What's at play here? I have ideas but not certain what's going on. Thanks.
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Re: Tight Then Loose

Postby Rip Van Winkle on Mon Nov 25, 2019 7:08 am

Lot's of variables at play here. My first guess with military rifles would be a rough bore quickly fouling out.
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Re: Tight Then Loose

Postby Grandpa Rex on Mon Nov 25, 2019 7:55 am

+1 on the fouling as a first guess.

Depending on the range you use and it's rules, it would be an interesting experiment to shoot 3-4 groups and then clean the bore to find out.
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Re: Tight Then Loose

Postby xd ED on Mon Nov 25, 2019 8:40 am

I would have guessed the warm barrel moving around, and contacting the stock, but the 2 guys who previously posted are much smarter that I am.
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Re: Tight Then Loose

Postby Rip Van Winkle on Mon Nov 25, 2019 9:46 am

Temperature, stock fit and various parts on military rifles are all possibilities.

One has to remember, Military rifles are rarely designed for target accuracy.

ETA: I don't know anything, I just pretend to on the internet. ;)
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Re: Tight Then Loose

Postby 1911A45ACP on Mon Nov 25, 2019 6:37 pm

Grandpa Rex wrote:+1 on the fouling as a first guess.

Depending on the range you use and it's rules, it would be an interesting experiment to shoot 3-4 groups and then clean the bore to find out.
Now that's a good idea!! Will try that!
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Re: Tight Then Loose

Postby 1911A45ACP on Mon Nov 25, 2019 6:41 pm

xd ED wrote:I would have guessed the warm barrel moving around, and contacting the stock, but the 2 guys who previously posted are much smarter that I am.
I can't rule that out either with the un-issued rifles with new bores. I always allow time between shots for cool down, but I think I'll go for a total cool down and then try again. These old military rifles are no competition shooters....that's for sure. Stock making was bare bones I suspect.
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Re: Tight Then Loose

Postby 1911A45ACP on Mon Nov 25, 2019 6:44 pm

Rip Van Winkle wrote:Temperature, stock fit and various parts on military rifles are all possibilities.

One has to remember, Military rifles are rarely designed for target accuracy.

ETA: I don't know anything, I just pretend to on the internet. ;)
Yup, for sure! Just accurate enough for the kill zone, not MOA. I love shooting them all the same. But would be interesting to see if I can dial in and maybe work the stock to my advantage.
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Re: Tight Then Loose

Postby jdege on Mon Nov 25, 2019 7:08 pm

1911A45ACP wrote:What's up with that. I shoot my military surplus rifles and with some of them I get tight groups. But with each subsequent 5 shot group they start to open up. What's at play here? I have ideas but not certain what's going on. Thanks.


The rifling is coming loose?
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Re: Tight Then Loose

Postby 1911A45ACP on Mon Nov 25, 2019 9:41 pm

jdege wrote:
1911A45ACP wrote:What's up with that. I shoot my military surplus rifles and with some of them I get tight groups. But with each subsequent 5 shot group they start to open up. What's at play here? I have ideas but not certain what's going on. Thanks.


The rifling is coming loose?
Ohhhhhh.....well, nothing Gorilla Glue couldn't fix. Or some duct tape maybe.
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Re: Tight Then Loose

Postby Holland&Holland on Mon Nov 25, 2019 11:00 pm

Come on, don't be an amateur. Use JB weld.
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