Anyone modify brass shells to use 209 primers? I find 209 primers easy to purchase; and have a lot on hand. Was told that in cowboy action reloads, some ppl modify their brass. I have a 45/70 trapdoor and my large rifle primers on hand are getting low. I could make a 209 pocket in a 45/70 shell easily on my lathe. I do not shoot my trapdoor a lot. But prefer to reload because it is less expensive and I can trust my mild loads.