Thread: 300blk Loading Tips

Originally Posted by Beetroot

Are you saying the H110 will be better for supers?

I am saying that the seating forces that you get as a result of compressed loads can visibly damage projectiles.

When you come to loading supers, H110 and AR2205 both give good speeds but AR2205 is bulkier which leads to heavy compression up around max - somewhere you'll need to be IMO, given blackout's pretty pedestrian speeds.

Modifying your seating stem to match the bullet profile helps... a bit. My experience is with the 110 VMax, not the 125 TMK.

AR2205 fine for subs albeit a bit louder and dirtier at such low pressures vs faster powders like AP70N.

Originally Posted by Pommy

I am saying that the seating forces that you get as a result of compressed loads can visibly damage projectiles.

When you come to loading supers, H110 and AR2205 both give good speeds but AR2205 is bulkier which leads to heavy compression up around max - somewhere you'll need to be IMO, given blackout's pretty pedestrian speeds.

Modifying your seating stem to match the bullet profile helps... a bit. My experience is with the 110 VMax, not the 125 TMK.

AR2205 fine for subs albeit a bit louder and dirtier at such low pressures vs faster powders like AP70N.

As a powder that can be used for both Subs and Supers would you recommend H110 or 2205?
Or is it better to use a different power for each use?

Originally Posted by Beetroot

As a powder that can be used for both Subs and Supers would you recommend H110 or 2205?
Or is it better to use a different power for each use?

I use H110 for 125 grn BT and 240 grn SMK.around 19 grn and 9 grn(my cz 527.8 twist 16 inch)
Lil'gun for 110grn Amax.(??grn)

Originally Posted by Beetroot

As a powder that can be used for both Subs and Supers would you recommend H110 or 2205?
Or is it better to use a different power for each use?

H110 if you're only buying one powder, sure.

We don't have actions to cycle and can so we can use faster powders for subs though. Makes for a quieter load. You don't have to though - H110 or AR2205 will work.