Originally Posted by MudRunner2005
Another one of my new designs that's destined to be a masterpiece... I call it, the 7mm Malum.
Nice looking cartridge. Some tips...
The taper is only .004 per inch which is probably lead to extraction issues. Ackley's tapers were in the .008-.009 per inch range.
It looks like you've blown out the web about .002 thou from spec. A lot of guys when they design a cartridge/reamer, will actually push the web in instead of out. This helps keep the primer pockets tight and longer brass life. Also, new brass from the factory will usually be 2-3 thou less than spec so designing your dies and reamer to this dimension is a good idea IMO.
My suggestion would be to go to a .520 web diameter and a .502 shoulder diameter.
I would also recommend sending your drawing to Dave Kiff at PTG and give him a call and talk through your idea with him before you lay out any $$$$. That will go a long way in getting this right the first time.