UPDATE!
I found my box of CCI 38 shotshells which are the blue capsules and dont work in my derringer. Also in the box were a couple of yellow capsule rounds. It turns out that they were actual SPEER rounds and looked a bit narrower at the end of the plastic. They drop into the chamber just fine. It appears that SPEER was aware of the issue years ago, but the yellow capsules that they now sell for reloading snake shot are the same diameter as the CCI blue capsules and wont chamber. It is only about .011" difference. Probably the old guy at SPEER that was in charge of this sort of thing retired and the new guy didnt know there was any issue. From reading in our forum, I assume that this is a rare problem and most companies would not worry about the tiny percent of guns that have this issue. I have not fired my SHORTENED CCI round yet, I cant say anything about pressure indicators, but since the CCI rounds have no loose powder,( just a contained charge) and the seating depth is roughly the same, I dont think I will have any problem with them. Other than firing a couple of test rounds, I think my problem is solved. THANK YOU ALL, Grant.
I found my box of CCI 38 shotshells which are the blue capsules and dont work in my derringer. Also in the box were a couple of yellow capsule rounds. It turns out that they were actual SPEER rounds and looked a bit narrower at the end of the plastic. They drop into the chamber just fine. It appears that SPEER was aware of the issue years ago, but the yellow capsules that they now sell for reloading snake shot are the same diameter as the CCI blue capsules and wont chamber. It is only about .011" difference. Probably the old guy at SPEER that was in charge of this sort of thing retired and the new guy didnt know there was any issue. From reading in our forum, I assume that this is a rare problem and most companies would not worry about the tiny percent of guns that have this issue. I have not fired my SHORTENED CCI round yet, I cant say anything about pressure indicators, but since the CCI rounds have no loose powder,( just a contained charge) and the seating depth is roughly the same, I dont think I will have any problem with them. Other than firing a couple of test rounds, I think my problem is solved. THANK YOU ALL, Grant.