.410 cartridges
Many thanks for the info. You are on the right track because I have been experimenting with the charges and shot content of my cartridges.
Bizarley the combination which works best is 10grains of HD110 and 19.5 grammes of lead. I conclude that the inertia of larger loads (21gms) allows the cartridge base to expand and then the extractor cannot do its work so rips the base since that is clearly the weakest point. I did clean the chamber as far as I could and that worked but pretty soon clogged again. Believe it or not the gun cycles fine with just the 10grains something I tried not expecting it to work and was staggered when it did. I need to find a tool that I can use to clean the chamber with after every shoot. Also I have not had the recoil spring out since I bought the gun so that is in for a clean too since it may be delaying the movement of the action to the rear just that split second too long.
Many thanks for the info. You are on the right track because I have been experimenting with the charges and shot content of my cartridges.
Bizarley the combination which works best is 10grains of HD110 and 19.5 grammes of lead. I conclude that the inertia of larger loads (21gms) allows the cartridge base to expand and then the extractor cannot do its work so rips the base since that is clearly the weakest point. I did clean the chamber as far as I could and that worked but pretty soon clogged again. Believe it or not the gun cycles fine with just the 10grains something I tried not expecting it to work and was staggered when it did. I need to find a tool that I can use to clean the chamber with after every shoot. Also I have not had the recoil spring out since I bought the gun so that is in for a clean too since it may be delaying the movement of the action to the rear just that split second too long.
