175 MK's...1-10" or 1-12"?

[Guest]

175 MK\'s...1-10" or 1-12"?

This is for a 308 bolt gun with a Lothar Walther barrel that will be shot in Tactical Matches up to 1000yds. I want it to shoot the 175's, don't care about the 168's. Which would I be better off with? What muzzle velocity would I need to stay transonic at 1K?

Thanks, Keith

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[MontanaMarine]

Re: 175 MK\'s...1-10" or 1-12"?

Marine sniping rifles in .308 are twisted 1-12. Marines shot them out to 1000 yards with the 175grSMK.

S1, could you elaborate on the weather conditions where 1-12 will not work, and exactly what effect these weather conditions have on the bullet/accuracy. I do not ask out of disbelief, but it surprises me that the military would use 1-12 if 1-10 would have advantages in variable weather conditions.

Thanks, MM

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[MontanaMarine]

Re: 175 MK\'s...1-10" or 1-12"?

Thanks for the feedback S1.

I always prefered a 1-10 in my .308 bore rifles for versatility in bullet weights on the heavy end. I shoot 190 gr SMKs in my 1-10 twist 30-06. Work well. I've tried them in my 1-12 .308, to 200 yards. OK at that distance, but haven't shot them at long range.

MM

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[MontanaMarine]

Re: 175 MK\'s...1-10" or 1-12"?

BH, I'm not sure on the M40A3.

MM

 

[Meat Eater]

Re: 175 MK\'s...1-10" or 1-12"?

M-40 A3'S are 1-12" Schneider barrel's. 1.200" x 3" st. taper to .890 at 27" they cut at 24" from front of recoil lug or almost 25" tradional measurement at .920 dia.

[ 12-27-2002: Message edited by: Meat Eater ]

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[MontanaMarine]

Re: 175 MK\'s...1-10" or 1-12"?

I heard through the grapevine that the A3 had a 26" barrel. Havent seen one personally. (I'm an artilleryman)

MM

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[BountyHunter]

Re: 175 MK\'s...1-10" or 1-12"?

Montana Marine,

Are you sure on the Marine sniper M40a3's being a 1-12? I work at Quantico and thought the gunner in charge at Wpns trng Bn who builds all the M40s for the USMC told me that they are 1-11. I know for a fact the Army M24s are 1-11. I would be very surprised if they were still 1-12s.

BH

 

[Guest]

Re: 175 MK\'s...1-10" or 1-12"?

[ 07-12-2003: Message edited by: S1 ]

 

[308]

Re: 175 MK\'s...1-10" or 1-12"?

I have a used br barrel on my deer rifle cut at 21". It has a 14 twist, I use 150 nosler ballistic tips with great accuracy, the 165's shot well also, very well actually. I live and hunt in Fl, am I ever likely to see conditions where my slow 14 twist will not stabilze my bullets of choice? 308