What twist rate and length for 300WM barrel

[Steve Ladino]

If you're going to shoot the heavier bullets, the Tikka won't be as likely to stabilize them with that twist. The .300 Win Mag is a great caliber. My go to for all around hunting.

My Ruger LRT 300 W Mg. 9tw. x 26" handles the 190 to 208's .010 off, magazine fed....FYI

 

[Bart B.]

How much do bullet's spin rate in rpm decay across 1000 yards?

 

[Alex Wheeler]

If your thinking about the 230s Id go 9tw and the 215s will still shoot great. The freebore is quite different though. You will not get a freebore that is ideal for both, a good middle ground would be about .245. Id look at ADG for brass.

 

[lal357]

If your thinking about the 230s Id go 9tw and the 215s will still shoot great. The freebore is quite different though. You will not get a freebore that is ideal for both, a good middle ground would be about .245. Id look at ADG for brass as well.

ADG is my next stop on brass right now im shooting norma but its expensive around here (48.00 per 25 cases with tax ) (lgs rapes ya on about everything)

 

[D.Stone]

I'm going thru this very same process. I start by picking a couple bullets I'd like to shoot then go to a ballistic twist rate calculator site and put in WORSE CASE SCENARIO values of where most of your shooting will be. You now have your twist. Asking someone who shoots at 7000ft asl is not going to give you your answer. I live 21 ft asl and plan on making it out to Blakely also and most of what I'm finding with bullets above 215g is a 9 twist.

Then make a dummy round of the bullet you want to shoot and where you want it to be seated into the case, and ship it to your gunsmith along with the barrel, action, etc and ask to have the projectile just touch the lands on the finished chamber. This will give you some play in seating depth but still keep the projectile approximately where you want to seat it to. Doing this, you don't need a special reamer. Just a regular reamer and a throater to get you there.

I like 30" barrels on non hunting guns. I like the balance, the extra velocity when using slow powders, and the ability to possibly reach a higher accuracy node without pushing the load too hard.

Hope this helps

300WM really shines with the 215gr bullets and a 10 twist at Blakeley. I have fired on and hit targets out to 2112 yards in match conditions with my rifle.

The rifle I have has claimed 1st, 2nd, and 4th in the light gun class at Blakeley so far. As far as 30 Cal's are concerned, the 215 is hard to beat for absolute predictably.

 

[SGT G]

X2

Auuhhhh.... the preverbal argument on twist, scopes, etc.... Usually you will have some old timers that have had excellent results and that have tons of experience shooting slower twist. The more progressive thought is a faster twist because we are shooting farther today-well into subsonic and spin decay IMO is the lasting you want. The transition from supersonic to sub can be difficult for longer high bc projectiles especially at lower attitudes.
A 1/9 twist would be a good idea IMO.