PART 2 what twist what bullet in a 300 wsm heavy gun

following up on my original post, if I go 300 wsm what twist, what bullet ?
benchrest friendly brake ??
600/1000 yard bench rest (light) heavy gun

 

so 215 berger in a 30" 11 twist is THE ANSWER ?

 

IMO - No, not for the 215 Berger hybrid. I'd run a 1-10" for those in a 300 WSM.
A 1-11" may or may not shoot them accurately, but if it does it's going to be giving up some ballistic coefficient doing so. - Have a look a Berger's website and the "stability calculator".

- Ron -

 

I would go with the 10 twist

 

1-11. 210 Berger vld hunting bullet @ 2840

1-10. 230 Berger OTM @ 2850

Either one of these will drive tags @1K

 

I use a 10 twist with Berger 210's in my bench gun.

 

I totally agree with the twist rate that some of the posters have made a 10 twist would be ideal but I still have another question what's the weight of this new heavy gun.

 

I've had a 11 twist barrels shoot the 210's awesome and I've had 11 twist that didn't shoot worth a darn. I've never had a 10 twist that didn't work. I proved my theory to myself by taking the 11 twist that didn't shoot well and tried a 200 hybrid, that combo won a lot of stuff

 

A 1-10" twist will handle just about any bullet you want to try! I've always used 10 twist.

Joe Salt

 

between 18 and 25....leaning to the heavy end. straight bbl or very small taper.
some butt weight maybe.

 

I would lean closer to 25 for tracking purposes especially shooting 10 shot groups good luck it's a very accurate cartridge for long range for sure.

 

My current 300Win Mag barrel is a 10 twist. It does pretty well with the Berger 230 OTM at 1,000 but I really think accuracy could be improved with a faster twist. I have two blanks sitting here now; one is a 9 twist and the other an 8.5 twist. The decision for me as to which will get the nod is dependent on the question of staying with 300WM or going to 300PRC with the 250 Atip. The days of a 10 twist being "fast enough for anything" IMO are over. Especially so depending on your climate and altitude. New bullet designs and weights are going to require faster for best results.

 

I've got a 1-11'' for 200-207's, not worried a bit, they'll get there just fine.

 

I have shot a bunch of 10 and 11 twists. Accuracy is great with both, but I shoot 210 VLD's. I believe the 10 holds a slight accuracy if conditions are worse but it seems an 11 will outshot the 10 in good conditions. If you plan on using the 215 get a 10. Matt

 

Matt might know a thing or two after 7 world records
J

 

I know for a fact that the 215 will shoot great in a 10 twist. Many aggs and records were broke at 1000 yards with this combo. I also know that the 210 VLD shoots great in an 11 twist. I've won a few times with it. Matt

 

They shoot in a 1-10 No problem -

 

Matt is right about what he is saying, those are recommendations and don't mean squat!

Joe Salt

 

Those "recommendations" were published to cover a broad stroke of possible velocities and that is why Berger frequently updates this data.
a 24" barreled 300 WSM hunting rifle at cooler temperatures and low elevation may in fact favor a 1-9" twist and I believe that is why Berger has taken the measures they have to revise recommended "optimal" twist rate publicized data.
Those of us who shot the 215's in a LR Benchrest gun know that a 1-9" twist isn't required or even desired. - A 1-10" yields the accuracy we are looking for.

- Ron -