Peter M. Eick
Member
The title says it all.
Any ideas on why Seirra #5 is suggesting 17.4 grns max and 15.5 grns minimum for cci-550's and their 140 grn JHC load with 2400 (col of 1.585)? This seems awful hot for this combination.
With the same basic combination:
Hornady #1, 11.9 to 15.5 (max)
Nosler #4, 150 grn (close but heavier) 14.2 to 15.2 (max)
Speer #13, 13.1 to 15.1 (max) (non-mag primer)
Needless to say I am a devout cross checker of load data. Since Speer is using a non-mag primer I will let them off the hook, but the rest are a lot lighter then seirra. The closest Alliant load is a 158 grn JHP at 15.2 grns.
SOOOOO, even though I am using a seirra 140 grn JHC, I think I will start out at the 14 grn level and work up cautiously since this is below the Seirra minimum load.
By the way, anyone else faced this quandry? It seems to me Seirra #5 is pretty mild for a lot of loads.
Any ideas on why Seirra #5 is suggesting 17.4 grns max and 15.5 grns minimum for cci-550's and their 140 grn JHC load with 2400 (col of 1.585)? This seems awful hot for this combination.
With the same basic combination:
Hornady #1, 11.9 to 15.5 (max)
Nosler #4, 150 grn (close but heavier) 14.2 to 15.2 (max)
Speer #13, 13.1 to 15.1 (max) (non-mag primer)
Needless to say I am a devout cross checker of load data. Since Speer is using a non-mag primer I will let them off the hook, but the rest are a lot lighter then seirra. The closest Alliant load is a 158 grn JHP at 15.2 grns.
SOOOOO, even though I am using a seirra 140 grn JHC, I think I will start out at the 14 grn level and work up cautiously since this is below the Seirra minimum load.
By the way, anyone else faced this quandry? It seems to me Seirra #5 is pretty mild for a lot of loads.