A friend suggested that I try the following load from the Alliant manual.
Cases: New style Win AA
Primer: Nobel Sport
Wad: DRRT12 (1 oz)
Powder: Green Dot
I'm using West Coast Magnum reclaimed shot and a MEC Grabber press.
The starting load of 19.6 grains/1,200 fps load gives a near perfect looking reload. 20.0 grains or more results in anywhere from an opening the size of a piece of #8 shot to a gaping hole. I've talked to Customer Service at MEC and they attribute it to either the powder being too bulky, wad height or combination of both. The folks at DownRange say the load should work. Customer Service at Alliant say it’s probably the base-construction of the new-style AA cases, wad height or combination of both.
The Problem: The 33 bushing works (drops 19.3 to 19.8 grains) when I operate the press manually, howeverk, when I use it in the progressive mode the powder weight drops approximately 5 grains (18.8 to 19.3). The 34 bushing dumps weights in the 20.5 or higher range when operated in the progressive mode, resulting bad to no crimps. I've tried everything I can think of to correct the problem. Unfortunately, I have thousands of AA cases and 8 lbs. of Green Dot. Would an adjustable charge bar help to maintain a more consistent powder weight? Yes, I've weighed the shot drops and seems to be acceptable. I'm frustrated as all get out and looking for remedies. Thanks.
PS: My previous reloads looked and worked great.
Tom
Cases: New style Win AA
Primer: Nobel Sport
Wad: DRRT12 (1 oz)
Powder: Green Dot
I'm using West Coast Magnum reclaimed shot and a MEC Grabber press.
The starting load of 19.6 grains/1,200 fps load gives a near perfect looking reload. 20.0 grains or more results in anywhere from an opening the size of a piece of #8 shot to a gaping hole. I've talked to Customer Service at MEC and they attribute it to either the powder being too bulky, wad height or combination of both. The folks at DownRange say the load should work. Customer Service at Alliant say it’s probably the base-construction of the new-style AA cases, wad height or combination of both.
The Problem: The 33 bushing works (drops 19.3 to 19.8 grains) when I operate the press manually, howeverk, when I use it in the progressive mode the powder weight drops approximately 5 grains (18.8 to 19.3). The 34 bushing dumps weights in the 20.5 or higher range when operated in the progressive mode, resulting bad to no crimps. I've tried everything I can think of to correct the problem. Unfortunately, I have thousands of AA cases and 8 lbs. of Green Dot. Would an adjustable charge bar help to maintain a more consistent powder weight? Yes, I've weighed the shot drops and seems to be acceptable. I'm frustrated as all get out and looking for remedies. Thanks.
PS: My previous reloads looked and worked great.
Tom