Other Cheytac powder options

[Bravo 4]

Don't see why not, another Rocky Mountain?

I just woke up thinking about that powder charge, apparently it didn't sit with me that well. So I went out to the shop and went through my notes, the number I gave was more of where I started and not the final. I changed the post above to reflect the load I settled on. Notes say I got to 153 grains (compressed) with Jamison brass before pressure showed it's ugly head. Had no pressure with Bertram but dropped it down anyways for best accuracy.

 

[jbs2014]

Thanks for the info.

 

[jbs2014]

Off the top of my head I believe it was 147 grains with the 415 CEB MTH. It was actually a middle of the road velocity load @ 2900 fps (got almost 3100 before pressure appeared) but man was it accurate!

I know this thread is two years old now, but after the last post I found an excellent load with Retumbo, but Retumbo is pretty much extinct now and I am on my last 8 LBs.

So is 147 grains of RL33 a good start point for .408 with 420 grain projectiles?

Thank you for your time

 

[Deleted member 102985]

Listening....

 

[Bravo 4]

Not knowing what brass you are using and your OAL I would say to drop it down several more grains, 140 or so. There is quite a bit of weight difference between my Bertram and Peterson brass.

 

[jbs2014]

Not knowing what brass you are using and your OAL I would say to drop it down several more grains, 140 or so. There is quite a bit of weight difference between my Bertram and Peterson brass.

I'm using Peterson brass
COAL Is 4.348
Desert Tech HTI 29" barrel
I got my best ES with about 2850ish FPS

thanks again for the info

 

[jbs2014]

Bravo 4 did you ever try RL25? If so was it any good?

 

[Bravo 4]

Yep, didn't get the speed 33 gave.

 

[jbs2014]

Yep, didn't get the speed 33 gave.

Did you get in the 2850 range?

 

[Bravo 4]

That was about it for a comfortable load, with great groups at 100. I got up to almost 3100 fps with RL33 before I hit pressure (3080 I believe). I ran it at 2900 because it had crazy precision and very easy on brass. When doing load development at 400 yards the load I settled on shot 3 consecutive groups that averaged well under an inch with the largest being .96", it carried exceptional precision waaayyyy out.

 

[jbs2014]

That was about it for a comfortable load, with great groups at 100. I got up to almost 3100 fps with RL33 before I hit pressure (3080 I believe). I ran it at 2900 because it had crazy precision and very easy on brass. When doing load development at 400 yards the load I settled on shot 3 consecutive groups that averaged well under an inch with the largest being .96", it carried exceptional precision waaayyyy out.

3100 is awesome, what barrel length?

 

[Bravo 4]

28" Lawton, it was a factory Cheytac M310.