Reloader 21 for a 6BR

[zullo74]

Since powder is getting hard to find, and I have 3# of the obsolete Hercules Reloader 21 that I use in my 22-250, can any one suggest a starting load for the 6BR and Sierra 80 grain Blitz bullets?

I found this powder burn rate chart online, and it shows Hercules Reloder21 is right below Alliant Reloder15,#188 &189). If the burn rates are that close, do you think I can substitute the Reloader 15 data in Quickload for my Reloder21 and develop a load?

 

[zullo74]

Yes I can!

 

[Stonewall]

I don't see how you can -really.
The two powders composition is quite different.

Now if you looked at the old loading data for Rl-21 you might get a better idea .
Three pounds won't last long.

I would shoot it up in the .22/250.

I used RL-11 ar 32.5 gr with a 52 gr match bullet in a 22/250 a long time ago.


Glenn ;D