Steve MEans
Inactive
I just purchased a winchester m70 in 7mm rem mag. I was told by a friend to come here and ask for help on how to break it in. I would have searched as I'm sure its been covered, but the search function isn't working.
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Breaking in new rifle.
- Thread starter Steve MEans
- Start date
I'm going to assume, (yes, often a bad idea, but...), that you're ulltimately concerned with having an accurate rifle, so here goes. This is a resonable facsimile of the method suggested by the Sinclair reloading manual.
http://www.sinclairintl.com
These folks are benchresters, and have some really good ideas about rifle accuracy.
1. Shoot 1 round
2. Saturate a patch with a quality bore cleaning solvent, (Hoppes, Shooter's Choice, etc). There is some disagreement about using an ammonia-based solvent to break in a bore, esp. a stainless steel barrel. Probably best to stick with the old stand-bys. Run the patch through the bore. Repeat.
3. Use a bronze brush w/ solvent and run it through the bore at least 10 times. Remember to use a bore guide and a quality rod.
4. Wet patch through the bore. Repeat.
5. Dry patch through the bore. Repeat 2-5 until patches come out clean.
6. Repeat steps 1-5 three times. (3 rounds total)
7. Shoot 2 rounds through the bore.
8. Repeat steps 2-5.
9. Repeat steps 7-8 three times. (9 rounds total fr. 1-9)
10. Shoot 3 rounds through the bore.
11. Repeat steps 2-5.
12. Repeat steps 10-11 three times. (18 rounds ttl. fr 1-12)
13. Clean bore with copper solvent. Follow the directions on the bottle, but make sure that no blue appears on the patch before you proceed.
14. Shoot 4 rounds.
15. Repeat steps 2-5.
16. Repeat steps 14-15 three times. (30 rounds total)
17. Repeat step 13
19. Shoot 5 rounds.
20. Repeat steps 2-5.
21. Repeat steps 19-20 three times. (45 rounds total)
22. Repeat step 13.
23. Shoot 7 rounds. Proceed in a similar fashion to the above steps. If the bore is cleaning up well, you can probably start developing loads after this stage, as well as shooting in your normal manner at about 100 total round through the bore. Some bores foul really badly, though.
This process is time intensive, but benchrest shooters are really focused on accuracy. To the point of OCD. It might be a good idea to contact them, as this is the process that I remember and may not be the actual process they describe. It's pretty close, though. I think my math is correct, but...
Good luck.
S.
http://www.sinclairintl.com
These folks are benchresters, and have some really good ideas about rifle accuracy.
1. Shoot 1 round
2. Saturate a patch with a quality bore cleaning solvent, (Hoppes, Shooter's Choice, etc). There is some disagreement about using an ammonia-based solvent to break in a bore, esp. a stainless steel barrel. Probably best to stick with the old stand-bys. Run the patch through the bore. Repeat.
3. Use a bronze brush w/ solvent and run it through the bore at least 10 times. Remember to use a bore guide and a quality rod.
4. Wet patch through the bore. Repeat.
5. Dry patch through the bore. Repeat 2-5 until patches come out clean.
6. Repeat steps 1-5 three times. (3 rounds total)
7. Shoot 2 rounds through the bore.
8. Repeat steps 2-5.
9. Repeat steps 7-8 three times. (9 rounds total fr. 1-9)
10. Shoot 3 rounds through the bore.
11. Repeat steps 2-5.
12. Repeat steps 10-11 three times. (18 rounds ttl. fr 1-12)
13. Clean bore with copper solvent. Follow the directions on the bottle, but make sure that no blue appears on the patch before you proceed.
14. Shoot 4 rounds.
15. Repeat steps 2-5.
16. Repeat steps 14-15 three times. (30 rounds total)
17. Repeat step 13
19. Shoot 5 rounds.
20. Repeat steps 2-5.
21. Repeat steps 19-20 three times. (45 rounds total)
22. Repeat step 13.
23. Shoot 7 rounds. Proceed in a similar fashion to the above steps. If the bore is cleaning up well, you can probably start developing loads after this stage, as well as shooting in your normal manner at about 100 total round through the bore. Some bores foul really badly, though.
This process is time intensive, but benchrest shooters are really focused on accuracy. To the point of OCD. It might be a good idea to contact them, as this is the process that I remember and may not be the actual process they describe. It's pretty close, though. I think my math is correct, but...
Good luck.
S.
Steve Smith
New member
Wow.
According to Gale McMillan, the whole "barrel break-in" was just a good way to wear out barrels faster, so the barrel guys would get more business. He advised "just shoot it." Basically, he advised wet cleaning often, but no scrubbing, unless it was absolutely necessary.
According to Gale McMillan, the whole "barrel break-in" was just a good way to wear out barrels faster, so the barrel guys would get more business. He advised "just shoot it." Basically, he advised wet cleaning often, but no scrubbing, unless it was absolutely necessary.