If some of you recall, I posted some velocity and pressure tests using a NEF 12 gauge shotgun (26� barrel) outfitted with a strain gage for the Oehler M43 PBL. This, too, might be of some interest.
Remington factory Premier STS Light Handicap (3 Dr. Eq., 1-1/8 ounces #8 shot, nominal 1200 fps). Velocity average 1158 fps @ 10,100 psi. Velocity standard deviation = 16 fps. Pressure standard deviation = 400 psi.
Winchester factory AA Heavy Target Load (3 Dr. Eq., 1-1/8 ounces #7-1/2 shot, nominal 1200 fps). Velocity average 1189 fps @ 9,500 psi. Velocity standard deviation = 16 fps. Pressure standard deviation = 500 psi.
I also did some chronographing with different shotguns. This is for the factory Remington loads.
Browning Sporting Clays Edition, 28� ported barrel, full choke tube, 1179 fps.
Browning M525, 28� barrel, full choke tube, 1199 fps
Remington M11-87, 26� target barrel (2-3/4� chamber), trap full choke tube, 1136 fps.
Remington M11-87, 30� target barrel (2-3/4� chamber), trap full choke tube, 1161 fps.
The Winchester AA factory loads produced:
Browning Sporting Clays Edition, 1213 fps.
Browning M525, 1225 fps.
Remington 11-87 (26� barrel), 1170 fps.
Remington 11-87 (30� barrel), 1209 fps.
Although the Winchester AA ammunition was recently purchased, it was the old-style, one-piece AA hull. To keep things as consistent as possible, I use the same choke tube in each of the Brownings. I also used the same choke tube in both of the Remingtons.
http://www.reloadingpro.com 
