If you are using Alliant or Hodgdon power for 12 ga. you have lots of data for different primers. Look for loads you have components for that have low pressures. I asked Alliant about substituting Fed 209A primers in their 20 & 28 gauge receipts. Here is what they said:
At this time we are working off from two independent studies where only primers were changed in load data. From these studies, swings in pressure by as much as 2500 PSI were noted. Based on this we are using the guideline that if pressures fall between 6500 - 8500 PSI, a primer swap is allowed.
Looking at our load data and using your components (Remington hull, CB1034-20, Remington 209P primers (used in testing) and velocities between 1200 -1250 FPS, the charges of 20/28 propellant would be 14.4 - 15.4 grains. The pressures for these loads are 7200 - 8200 PSI. So in this case yes you could use the Federal 209A primer.
Thanks,
Duane V. /Technical Service Representative
Here is what he said for 28 gauge loads and Fed 209A primers.
In this case, based on the same information I relayed to you on the 20 gauge loads, you would not be able to use the Federal primers. The one load we have for your components has a pressure in exess of 11670 PSI. This is well beyond the window mentioned in the earlier email.
Shotshell -
Gauge: 28
Hull Length: 2 3/4
Hull Brand: Win AA
Primer Brand: Fed 209A
Shot Type: 8 magnum
Shot Weight (oz.): 3/4
Wad Make/Model: Win AA HS
Desired Velocity: 1200-1250
Powder: 20/28
|
Hybrid Mode