I have been reloading .45ACP with 4.0 grains of Bullseye and a 230gr lead bullet. The loads are, in my opinion, too weak. The cases rarely clear my elbow on ejection and I just verified that there is about 12" of bullet drop at long ranges. I don't actually know what range I was shooting at but I noticed it initially at the IDPA match stage that took place in the rifle bay at Bill's. Whatever the length of that bay is minus ~20 feet I was shooting really low. I went to the range today and had the same results.
So, my question is, how do I know what amount of powder is safe? The recipe I am using is from Alliant and says it is a "target" load. I have also seen loads that say 5.0 grains of powder but with a FMJ bullet. I assume that if I just loaded a batch with 4.5gr that nothing awful would happen but thought I would check here first.