Looking for 20 BR and 20 PPC loads for 55 grain Bergers

[Tommie]

Gettig the wheels moving on a 20 cal project gun that’ll fit right between PPC and BR powder capacity. Setting it up to shoot 55 grain Bergers. I’m seeing lots of load data for 50 grainers (now discontinued) but very little for the 55’s.

Thanks!

 

[JASmith]

H414 has worked well for me in the 20 Grendel — http://shootersnotes.com/articles/20-grendel/

The cartridge is also between the case capacity of the BR & the PPC.

I kept the pressures down around an estimated 50 ksi to keep AR bolts more comfortable.

I got a nice flat velocity trend of about 3080 fps woth loads between 28.8 and 29.2 gr H414 in a 20 inch barrel.

Other powders moght work better but I was OK with these results.

 

[MrMajestic]

I bet RL17 will make it sing.

 

[Tommie]

H414 has worked well for me in the 20 Grendel — http://shootersnotes.com/articles/20-grendel/

The cartridge is also between the case capacity of the BR & the PPC.

I kept the pressures down around an estimated 50 ksi to keep AR bolts more comfortable.

I got a nice flat velocity trend of about 3080 fps woth loads between 28.8 and 29.2 gr H414 in a 20 inch barrel.

Other powders moght work better but I was OK with these results.

That’s some great information. Thanks for sharing.

 

[Tommie]

I bet RL17 will make it sing.

Been looking at RL17. Does look like a good burn rate.

 

[Wirelessguy2005]

accurate 2520 is a good powder to use in the 20 PPC and RL15 is a great option for the 20BR with 55 grain bullets. If you test with those 2 powders i am sure you will find something that works for you.

 

[Tommie]

accurate 2520 is a good powder to use in the 20 PPC and RL15 is a great option for the 20BR with 55 grain bullets. If you test with those 2 powders i am sure you will find something that works for you.

That’s surprising. I would have thought those powders would be too fast burning with the 55’s.

 

[barefooter56]

That’s surprising. I would have thought those powders would be too fast burning with the 55’s.

Tommy,
Just an FYI . Use the 1-8 barrel twist rate with your 20 BR and 20 PPC barrels due to the extra velocity. For the .204 Ruger and the like the 1-7 barrel twist rate should be used.

 

[B23]

Tommy,
Just an FYI . Use the 1-8 barrel twist rate with your 20 BR and 20 PPC barrels due to the extra velocity. For the .204 Ruger and the like the 1-7 barrel twist rate should be used.

This is what I did with my 20-250 build for shooting the 55's but I hear of many that get by fine with 1-9's shooting the 55's too.

 

[Tommie]

This is what I did with my 20-250 build for shooting the 55's but I hear of many that get by fine with 1-9's shooting the 55's too.

I may regret it but enough people advised me that 1-9” will work fine and that’s what I’m going with.

 

[B23]

I may regret it but enough people advised me that 1-9” will work fine and that’s what I’m going with.

I don't know about the 20 BR or the 20 PPC but I talked to Kevin Weaver awhile back and he was running a 1-9tw on his personal 20-250 w/55's.

 

[Wirelessguy2005]

Out of curiosity how many 7 and 8 twist 20 calibers have you tested with a 55 berger?

Tommy,
Just an FYI . Use the 1-8 barrel twist rate with your 20 BR and 20 PPC barrels due to the extra velocity. For the .204 Ruger and the like the 1-7 barrel twist rate should be used.

 

[rickiesrevenge]

In my 8T 20BR I use Varget with the 55's. Works great.

 

[Tragiq]

I'm considering either the 20 Beggs (or 20 PPC) or 20 BR. Anyone have any additional load data on these? Also, what's the expected barrel life for 20 Beggs/PPC and 20 BR? Thanks!