20 br load quations

[xpppcbr]

Anyone got any load data on a 20br with the 32 grn bullets ? I have alot of varget and h322 I shoot in my 22br and 6br or am I gonna have to shoot the 40grn bullets it's 1-10 twist

 

[JSH]

I would go with the 40’s just to take advantage of what you have. The BR case imho is about as much as you can do with a 20 caliber, or what is needed.
32’s you could easily get speed with lower charges.
I built mine with the sole intention of running nothing but 55’s. It may see some 40’s at some point.

 

[Hotshot]

Years ago I built a 20BR 10 twist to shoot 50 grain bullets. Before I finished the rifle Berger discontinued the 50's. It shot 40 vmax real well. 4300+ fps was a mild load. 39 SBK bullets came apart at that velocity so I had to slow them down a little. I never tried 32's. Probably get 4800+ fps if they would hold together. That would be exciting if they were accurate.

 

[Zero333]

No actual experience, but I'll run Quickload for you and maybe that might give you some idea ?
Reduce, Reduce, Reduce, then work up the load.
------------------------------------------------

Bullet - 32 gr Sierra Blitzking
Charge Weight / Powder - 30 gr - H-322
COAL - 2.070"
Case fill - 95 %
Chamber Pressure - 59,726 psi

Charge Weight / Powder - 32.5 gr - Varget
COAL - 2.070"
Case fill - 103 %
Chamber Pressure - 58,485 psi
======================

Bullet - 40 gr V-max
Charge Weight / Powder - 28.5 gr - H-322
COAL - 2.070"
Case fill - 92 %
Chamber Pressure - 59,646 psi

Charge Weight / Powder - 31 gr - Varget
COAL - 2.070"
Case fill - 100 %
Chamber Pressure - 58,483 psi

 

[L.Sherm]

I would stick with the 40's and give 8208 a try if you have any

 

[Tommie]

Total ditto on 40’s

 

[xpppcbr]

Yeah I think I'll stick with the 40s , I have quite a few of the 32s just no data on the powder I have alot of but may still try those ones given just to see what happens . I can buy 32s all the time local I'll have to order some 40s . Thanks so much guys for the help

 

[17VLD]

My 20 BR was built with a heavy Lilja when 12 twist was all there was and I used the 40 Berger and the 39 BK with awesome accuracy. My load was 31.0 of N540 right at 3950fps.The 39 BK got me in the 500 yard club pretty easily, glad to see em available again.If I had a 10 twist I’d definitely try the 40 VMax too.Next for me is a 20BRAI 9 twist with 55s.Depending on where you live I be tempted to set your barrel back a thread and chamber for the 20 BRAI and try a few 55s just for fun, if it works great if not you will still have a rifle that does great with the 39 and 40s.PDs and chucks will be in big trouble out past 600 yards.

 

[RegionRat]

There is just a little data shown for 20 BR on the Hodgdon web site. Here it is:

 

[L.Sherm]

AA2520 is another powder to not overlook, I found it very similar in burnrate to RL15 testing in my 20PPCAI.