Are Sellier & Bellot large pistol primers naturally harder to fire? I haven't had an issue using them in .45ACP with an 1911. However, I used these primers in 45 Colt using a Circuit Judge and 3 out of five wouldn't fire. I tried around fifty of these loads and the results were the same. These days primers are hard to come by much less being picky about brands. Should I look for a different primer?