Hey Quickdraw,
I never tried to make any loads for an auto loading pistol. I have always had both auto loaders and revolvers, and it always seemed more simple for revolver loads. As I mentioned in an earlier post, I make my loads with just the brass rather than using the shot capsules. I have always thought a auto loader would have trouble feeding my loads, and I also suspected the capsules might break if used in an auto loader. Perhaps someone else has had success making snake loads for an autoloader and can tell about it.
I also tried another experiment with the 44 Mag which was not a success for me. I had always wanted to get more of a shot load (without using capsules), and I thought I would make some long 44 Mag brass so it would reach to the end of the cylinder chamber.
If I recall correctly, I think I used 303 British brass which I cut and trimmed to the length of the cylinder and sized in the 44 Mag die. When I tried to put one in the cylinder, I found the new length case would not go all the way in because the chamber diameter is smaller where the bullet normally reaches from the end of the 44 Mag case to the end of the cylinder. Not to be stopped, I thought I could simply size the end of the new case a little smaller so it would fit in the cylinder. I have no idea what I used to size the end of the case the 3/8 or 1/2 inch that was necessary to fit the cylinder, but I did manage to size my test cases a wee bit so they would fit in the cylinder just fine.
Thinking I had it made at this point, I figured out a shot load and powder charge for my new cases. After loading the powder, I tried to put a 44 cal. gas check on top of the powder, and then I realized my idea would not work. Once the new 44 Mag "long" case had the end sized to fit the cylinder constriction, it was too small to get a gas check to enter and seat on the powder. I realized that I could have loaded the powder in an unsized case, seated the gas check on the powder and then sized the end of the case and loaded the shot. However, once the end of the case was sized smaller, I would not be able to seat a gas check on the top of the shot load. I also know I could have cut smaller card stock wads to top off the loads, but I did not think it was worth the trouble.
So, for 357 and 44 Mag loads, I simply use Mag cases as I described in my earlier post. Let us know how you make out with a 45 auto load. If it feeds alright, I might try it in my 10 MM.
Best wishes,
Dave Wile