6mmbr 1 in 12 twist

[richard295]

What range of bullets should work best? Are 90 gr to heavy for this twist rate?

 

[RJinTexas]

My 12tw will shoot the 90's ok but I can't go any heavier, it shoots the 88gr Berger Varmint-Match Grade bullets exceptionally well.

RJ

 

[JJH]

Handloader magazine just tested a Savage with a 1-12 and really liked the 70g bullets. You might want to check out the latest issue it has some real good recipies and general info that should help ya.

 

[MarkS]

richard295

90 gr should be too heavy, but there may shoot. Both of mine like 80 gr and anything under that. Search my name on the main site. '80gr and Egg shoots'.


Mark Schronce

 

[NorthFork]

Mine likes the 68 and 80gr Berger's the best.with Vv 135 powder.

 

[richard295]

This Savage 1 in 12 shoots the 68 and 70 gr best . . . and close second is the 66gr and the 80gr. Pretty typical I guess.
Did not try the 90's.

 

[cliffy]

Whoa! 6mm bores were expressly designed for minimum 1-in-10' twists, which made moot the .244 Remington in 1-in-12' bug buster twist. Rehashing why a Winnie Pooh .243 caliber can deliver a 100 grain bullet through the eye-of-a-needle seems going backwards-in-time to the 1950's. The 6mm Remington,same species) attempted to remedy this MISTAKE, but apparently failed miserably. To throw salt into an open wound, my 1-in-9 1/8' twister directs 105 grain Lapua Scenars quite accurately into the 10 ring: even on a BAD day. Cliffy

 

[effendude]

Cliffy,
Where do you come up with some of this stuff? The post was regarding 6mmBR's. You veer way off topic frequently. You say no one should have a slower twist than 1-10' 6mm rifle of any caliber. Huh? Keep posting messages, it is great entertainment.
Scott

 

[mwood]

I have had both 14:1 and 10:1 twist in a 6BR....they both work well for their intended purpose/ range/ wind conditions.

 

[AckleymanII]

I shoot the 55g Noslers in 3/4' groups at 300 at 3900 fps with a 1-12 twist, my load is 34.0g of AA2230, start off at 32 and work your way up if you try it.

This load is 7' flatter shooting than the 70's at 300 yards.

 

[12man]

Keith what primers were you using in that load? like to try that in my 1-10 twist should shoot real flat almost like the 22-250

 

[AckleymanII]

I am shooting 7 1/2's or BR-4's, I shot several groups in the zero's with this bullet.

Next, I pulled out a BR gun in 6PPC and and shot groups below .150 with a large powder spread using h335. These 55's are really something else.

I have a super accurate load worked up with 2230 with the 70's also, but the 55's are 7-8 inches flatter shooting at 300 yards. This means that you do not shoot over and under your targets in the field as much out to 400 yards.

Good luck and let us know how your rifle loves these bullets.

 

[chucksniper]

http://www.lasc.us/Brennan_2-3_Twist.htm

Try this site.... scroll down to the charts.

 

[I_shoot_for_fun]

I have a 12 twist on my Savage and the heaviest I have tried was the 80 grain Fowler. No problems with that bullet and twist out to 500 yards. I've shot various lighter bullets as well but never farther than 300 for some reason.

 

[Yellow11]

If you look at the math, settle for a gyroscopic stability factor of 1.4 and apply Don Miller's formula, then assuming a MV of 2800 fps, you can use 90g bullets if they do not measure more than 0.9' in length.

If the bullets get longer, then either reduce their weight or increase the twist.

Bryan Litz book offer much useful comments on this subject.

 

[cliffy]

Since I shoot more than I read, my downrange results are via chronograph and 10x target circle hits. Regarding hunting rifles, it's not rockette science. Mayhaps regarding Benchrest Only rifles weighing more than I'd carry afield, a slight accuracy margin can exist. However, I doubt that severely. Rifles were meant to hunt, not to see how a front rest and rear rest setting atop a sturdy bench with whatever devises can create one-bullet-atop-the-last-perfection. Love accuracy, but real circumstances of accuracy can only make my team. Cliffy

 

[benkrascal]

Anybody have some of those Berger 88's around? How long are they?

And what about the 87 v-max's? How long are those?

I have a 12T, and it seems to stabilize the 87's well enough. I'd like to try out the 88's, but don't know if I can stabilize them. I figure if they are close or shorter than the 87's I'd be fine.

 

[Steve Blair]

Berger 88s are 1.065"
87 V-Max are 1.037"

 

[benkrascal]

Eh, I guess I could give them a try. They aren't too much longer.

Thanks for measuring them for me, I appreciate it.

Ben

 

[favload]

For 1:12 Savage barrels stick with 80 gr Bergers or under. Anything heavier and you could have serious issues, like key holes in your 100yd target. I went through $200 in bullets over 80gr to come to this result.
Best loads

80gr Berger FB with 30.2gr of Varget or N135
68gr Berger with 31gr Varger or similar.
66FB shot ok
70gr SMK not so hot
Stick them WAY out seeing how they can't reach the lands anyway, at least in the first year's barrels.