I looked all over for some 20ga reloading supplied. I finally came up with some primed hulls, and a handful of components from BPI.
I'm wondering if you are trying to design a load from scratch, how to figure out a safe starting point. The real question is, how much does it change the pressure if you change wads, etc.
I am trying to work out a low recoil buckshot load just to try my hand at some cowboy shooting (It's a cut down side by side).
I found a published recipe for 3/4ounce that used a 14.5gr Unique charge. It claimed 9500psi and around 1100fps.
If I were to replace the plastic cushion wad with a gas seal, felt disc, maybe some cork to adjust the height, what effect would that potentially have? Is it possible it could crank the pressure high enough to be unsafe?
Under ordinary circumstances I have always followed the data to the letter. But these are not ordinary times!
As I mentioned, I'm looking for lower power close range load. Nothing that needs to rattle your fillings loose. I just want to make sure if I try something, I wouldn't inadvertently blow my barrel. I have a chrono, and would be able to test the speed. I thought if I could find a safe starting place, then from the speed I could dial it up or down a little bit to bring it to maybe 1200fps.
Thanks for any info. I've made some buck loads for 12ga because BPI claimed you could swap out shot for buck ounce for ounce. That the pressure is pretty constant. I'm just not sure of subbing out other components like wads