Shotshell Primer Comparison
Winchester 12-Ga. 2-3/4" AA Hull
17.0 Grains IMR 700-X Powder
Greenduster GT 9210-12 Wad
One Ounce No. 8 Lead Shot
Primer and Lot Velocity f.p.s. Chamber Pressure p.s.i.
Fed. 209A 03513 1251 (EV 14) 10,860 (EV 600)
Win. 209 NFL124 1246 (EV 22) 10,140 (EV 400)
Win. 209 MDL542 1224 (EV 30) 10,200 (EV 1700)
There doesn’t seem to be much practical difference in velocity, but certainly a difference in pressure with the Fed 209A primer. But how can one explain a drop in velocity and an increase in pressure between two lot numbers of the Win 209?
12-Gauge 2-3/4" Handload:
Fiocchi VIP plastic target hull (red, high basewad), once fired
Various primers
21.5 grains INTERNATIONAL CLAYS (Lot 2703L1592C)
HAWK wad (short crush section) 50 Ibs. seating force
1 oz. No. 8 West Coast Magnum lead shot (437.5 grs.)
8-pt. fold crimp
Crimp space: 1/2"
Primer and Lot Velocity (fps) Chamber Pressure (LUP)
Win. 209 / HAL021 1317 (ES 39) 9,400 (ES 1,400)
Fed. 209A / 03513 1331 (ES 43) 10,320 (ES 1,600)
Again, the Fed 209A produces a higher velocity and pressure with the same components. But the higher velocity and LOWER pressure with Win 209 in this example compared to the last example reveals the hull, powder and wad also influence velocity and pressure.