HOW TO BREAK A NEW RIFLE IN

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  • Last Post 04 September 2023
4895 posted this 02 September 2023

i decided to start shooting cast bullet again after years of rest. i got a pre 64 match rifle with a new match bullet and trying to break it in, whats the correct of doing so

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Larry Gibson posted this 02 September 2023

"with a new match bullet"........did you mean new match barrel?

LMG

Concealment is not cover.........

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4895 posted this 02 September 2023

i want this rifle to learn to like a cast bullet

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Bud Hyett posted this 02 September 2023

Clean out the jacket fouling and start experimenting with loads. I like Sweet's 7.62 initially followed by J&B to smooth the bore. But any of the newer copper removing solvents are good. 

I ruined a Savage 110S for cast by following Sweet's 7.62 with Shooter's Choice without first removing all the Sweet's 7.62. The bore was finely etched and never shot cast as well again. It still shot jacketed very well.  

Farm boy from Illinois, living in the magical Pacific Northwest

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John Carlson posted this 03 September 2023

This is kinda like the car/motorcycle question "what;s the best oil?".  Everyone has their own answer and they're all right.  Or they're all wrong.  Whatever.

John Carlson. CBA Director of Military Competition.

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John Alexander posted this 03 September 2023

I don't think there is any evidence to show that the usual shoot one and clean shoot 2 and clean etc. improves a barrel.  It would be very hard to design an experiment to see if it amounts to anything. Tony Boyer doesn't do it and his barrels seem to shoot fine.

Maybe a good excuse to spend more time at the range and you can't beat that.

John

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lotech posted this 03 September 2023

After you get it on paper, start shooting groups. 

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delmarskid posted this 03 September 2023

I give any gun new to me a good cleaning and then use it the way I intend to use it for as long as I own it. I did a couple break in procedures and they didn’t hurt anything but I don’t know if they helped either.

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Ken Campbell Iowa posted this 04 September 2023

" Do No Harm " ... comes to mind ...

i am pretty sure that ... correctly done .... lead lapping, and especially lead taper lapping ... is worthwhile ... at least for easier cleaning  and theoretically more consistent barrel conditioning shot to shot ...

i am positive that fluctuations of barrel conditioning in cast shooting is a major cause of mysterious and sometimes outrageous fliers.

BUT ... since lapping falls outside of " breaking in "  >>>  Moving On ...

i don't think anything short of just shooting a thousand shots will do anything for your barrel proper ... FWIW a thousand shots actually improves the barrel proper ... 

but chambering raises burrs ... and if your chamber throat wasn't de-burred before shipping, as most factory ... even expensive ... rifles are not ... you could work on smoothing the throat ... one easy way that is a safe conpromise between nothing and too much is to " fire-lap " about 6 or 8 mj bullets with 600 - 800 grit abrasive rolled into the jacket.  not lead bullets, and not scores of abrasive shots ...  " Do No Harm " ....  on most barrels this will not be needed ... but on a few I have seen a noticeable and immediate group improvement.

notice that benchresters say " just shoot it .." ... but remember they paid $600 for a pro gunsmith who polished their chamber and throat before shipping.

ken

 

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