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1/10 rifleing

Mossbergboogie
Okay guys I have a lot of techincal stuff to learn about bullet weight choice and rifling. So I have a Mini -14 it has I am pretty sure 1/10 rifleing. Will it shoot 62gr bullets okay or is 55 gr better. I usually stick with 55gr because that is what I have. I have a couple 45gr hollow points but never really shot many. Please help. Best luck I had was with Wolf 55gr fmj's in the old green case.
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3 comments

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  • zimmden
    1-10 twist should be fine for 62 to 65 gr. bullets. 1-9 or 1-8 is used for 68 to 80 gr bullets. Many 22 centerfires are 1-14 and stabilize all bullets up to 55 gr. The faster twist does not seem to adversely affect the lighter bullets.
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  • tsr1965
    quote:Originally posted by zimmden
    1-10 twist should be fine for 62 to 65 gr. bullets. 1-9 or 1-8 is used for 68 to 80 gr bullets. Many 22 centerfires are 1-14 and stabilize all bullets up to 55 gr. The faster twist does not seem to adversely affect the lighter bullets.


    I tend to agree somewhat. The 1:10 should work equally well for the 62, and 55 grainer's. The 1:7-1:9 are made for the 90 grain VLD's down to the 69 grainer's respectively.

    I have seen first hand, a 1:7 throw Hornady 40 grain v-max loads into a 6 inch group at 100 yards, and do about 1.5" with match 62 grainer's...both factory loads.

    Best
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  • sandwarrior
    chrishiher,

    The 1-10" will stabilize 62 gr. bullets. It should stabilize the 65 gr. bullets as well.

    A little background on this: The military started with a 1-9" twist to ensure stability of the new 62 gr. bullets being used (SS109/M855). What was found though, was that while 1-9" would stabilize the 62 gr. bullets, it would not stabilize the longer tracer bullets that matched the new 62 gr. bullets (M856). So they went to the 1-7" twist.

    Remember, length is the key factor not necessarily weight. Anyhow, as many have found out the tighter twist will accommodate 80 and even 90 gr. bullets. The tighter twist won't always cause lighter bullets to be less accurate. But, when you find lighter bullets being inaccurate in a tight twist you will usually find that the bullets aren't concentric. The faster twist amplifies the "wobble" produced. The lighter, shorter bullets fire accurately enough when fired from the slower twist though.

    -hope that helps
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