321BMT
03-28-2020, 06:49 PM
I have read that Herco is very close to Unique as far as charge weight to velocity - a little more Herco to get same velocity as Unique. Is the relationship the same for relative chamber pressures for the two powders? Does it take the same charge or a little more of Herco to reach the same chamber pressures?
Brian Pearce lists 10 grains of Unique under a 280 gr. SWC as a safe Tier II load. Would 10 grains of Herco under the same bullet likewise be a safe Tier II load?
I'm working up loads for mid-frame Ruger Flattop, and I have some Herco on hand and some 45-270-saa's from Matt's. I don't need to max out the load, but I'd like to have an idea of where that max is for this bullet before I start.
Starline cases and CCI 300 primers. OAL ~ 1.65"
If anyone has actually pressure tested similar loads or run them thru Quickload that would be really helpful.
Thanks
Brian Pearce lists 10 grains of Unique under a 280 gr. SWC as a safe Tier II load. Would 10 grains of Herco under the same bullet likewise be a safe Tier II load?
I'm working up loads for mid-frame Ruger Flattop, and I have some Herco on hand and some 45-270-saa's from Matt's. I don't need to max out the load, but I'd like to have an idea of where that max is for this bullet before I start.
Starline cases and CCI 300 primers. OAL ~ 1.65"
If anyone has actually pressure tested similar loads or run them thru Quickload that would be really helpful.
Thanks