If I were to bet on it, I'd expect that most of your over primer wads will still be in the case.

Mine generally are, but then I've never tried a 0.060" wad over the primer either.   

Wads can do funny things.  A number of times I've had LDPE wads ( over the BP charge ) land at my feet shortly after the rifle goes off.

Chris.

So how about a small pin hole in the under powder wad to make sure it sends the gases from the primer into the center of the powder.  A sort of weak point?   

What might be interesting is a perforated tube through the center of the powder...ignite all of the BP at once, like a recoilless rifle shell.  Ok...too complicated.   

I'm going to try duplex the spring.

Dave

Dave, Buffalo Arms sells a compression die that looks like it does what you are talking about.

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Chris.

gunlaker wrote on Mar 6^th, 2015 at 7:03pm:


Those threads on a press are the same as a 3/4 pipe thread.  You would be surprised how easy compression dies were made before they were invented    Of course, the lathe/machinists guys on here could whip one out in a few minutes 

Hey I like that idea of spring loading the pin. But that pin looks pretty big in diameter.

I've been playing with something similar in some experiments with 303Br. My pin is small enough to slide through the flash hole and it has a tiny amount of taper so it releases immediately on the backstroke. 

However.... even though I've bolted a 1/4" steel explosion shield to the front of my bench I'm still really uneasy about priming after charging. I think its time to rig up a die  for that spring mech.
I dont have any definitive results from my efforts yet. 3' of snow keeps me off the range.

Two stroke engines smell and sound GREAT! I have a 3-1 expansion chamber on my 1972 Kawasaki H-2. It'll break windows.

Early last spring I had to answer the primer question for myself so I used two known good loads and two rifles.
My 45-90 and 40-65 Brownings. The 45-90 was loaded with 82 grns. of Swiss 3f and a Baco Postell. The 40-65 was 71 grains of Swiss 1 1/2f and a Baco M4 Money bullet.
4 different primers were used with and without a yellow legal paper wad between the primer and case. Targets were shot at 3 and 500 yards for a total of 8 at each range.

In order of group size, large to small, the primers were Fed 215M, Rem 9 1/2LR, CCI BR-2 and Rem 2 1/2. When using a wad, I slotted a shell holder and fed the paper through like a long paper punch on a single stage press.

I was pretty amazed at the difference in group sizes that using a thin piece of paper between the primer and the case caused. In all cases, the smallest groups were with the Rem 2 1/2 primer with a paper wad, which kinda surprised me as I figured the heavy compressed charge of 3f in my 45-90 would need a stronger spark to get it going.

IF the snow ever melts up here in the Piney woods and my range shows it's self again, I want to experiment with thicker paper inside the case, just to see.

Craig