sniper
01-03-2017, 02:57 PM
This is an interesting forum! I just had a conversation with a Speer Tech, and he said Absoflamin'lutely NOT!:eek: for Speer shotshell capsules loaded into 357 Maggie brass, which is all I have at present. They have no data worked up for 357 Magnum brass. Lawyerproofing?
My oldest shot capsules are of ~ 1980 vintage...they are red and yellow, but I remember, way back then, loading them into 357 Mag brass with the recommended load of 5.5 gr. Unique, and shooting them with no problems.
Realizing there is more case capacity in the 357, which the Speer guy said would increase the air space in the cartridge, possibly causing a KABOOM. :???: my thinking, based on my past experience is this:
I can seat the shot capsules to 1.590 inches, which is the recommended max C.O.L. in the loading manuals I have, which would leave no more air space than a 158 gr. SWC seated in the same case. In fact, I think the shot capsule may compress the 5.5 gr. Unique. Perhaps experimenting with smaller charges of Unique...4.5-5.0 gr. might be edging into the "red zone"?
What do you fellows think, or know, that you would share?
Have you loaded the Speer shot capsules in 357 brass? What loads of Unique have you used, and what experience? I have Trailboss, but
I have heard it doesn't like to be compressed, which is what the Speer capsule would do to it. A load of Bullseye might do, but, I haven't really liked Bullseye when I used it. Am I about to make a mistake, here?
Thanx!
My oldest shot capsules are of ~ 1980 vintage...they are red and yellow, but I remember, way back then, loading them into 357 Mag brass with the recommended load of 5.5 gr. Unique, and shooting them with no problems.
Realizing there is more case capacity in the 357, which the Speer guy said would increase the air space in the cartridge, possibly causing a KABOOM. :???: my thinking, based on my past experience is this:
I can seat the shot capsules to 1.590 inches, which is the recommended max C.O.L. in the loading manuals I have, which would leave no more air space than a 158 gr. SWC seated in the same case. In fact, I think the shot capsule may compress the 5.5 gr. Unique. Perhaps experimenting with smaller charges of Unique...4.5-5.0 gr. might be edging into the "red zone"?
What do you fellows think, or know, that you would share?
Have you loaded the Speer shot capsules in 357 brass? What loads of Unique have you used, and what experience? I have Trailboss, but
I have heard it doesn't like to be compressed, which is what the Speer capsule would do to it. A load of Bullseye might do, but, I haven't really liked Bullseye when I used it. Am I about to make a mistake, here?
Thanx!