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MkII Rifling twist

This is a discussion on MkII Rifling twist within the Ruger Bolt Action forums, part of the Rifle & Shotgun Forum category; Just done the deal on a very nice M77 Mk2 stainless in .30-06, 2002 manufacture. Anyone know what rifling twist these have as I'm waiting ...


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Old November 30th, 2019, 01:52 PM   #1
 
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MkII Rifling twist

Just done the deal on a very nice M77 Mk2 stainless in .30-06, 2002 manufacture. Anyone know what rifling twist these have as I'm waiting for paperwork before picking it up. Good for 200gn bullets?

Many thanks.



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Old November 30th, 2019, 03:04 PM   #2
 
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It should have a 1:10..........If you want you can check it yourself. It's very easy, grab a cleaning rod and put a piece of tape on it, (so it looks like a flag) insert the rod into the barrel. when the "flag" has made one revolution measure the length of travel....one turn in 10' equals 1:10........ one turn in 12' equals 1:12 and so on.

A 1:10 twist will stabilize bullets up to 220grs.
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Old December 1st, 2019, 02:28 AM   #3
 
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Thanks Mark.

I pick the rifle up next week. I want to get some ammo loaded prior to that and have specifically gone with it for heavier bullets over my short .308. Just wanted to check as sometime Murphy comes along....
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Old December 1st, 2019, 06:56 PM   #4
 
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Quote:
Originally Posted by Mark204 View Post
.one turn in 10' equals 1:10........ one turn in 12' equals 1:12 and so on.
Right technique, right numerical values but wrong length units. It should read:.....one turn in 10" equals 1:10....one turn in 12" equals 1:12....

I assume the foot indicator (') was just a typo.
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Old December 1st, 2019, 07:16 PM   #5
 
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Yes it was a typo.........did you try it and find out 10 feet didn’t work? lol

Last edited by Mark204; December 2nd, 2019 at 03:33 AM.
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