I have been using relitive quickness charts loading rifle and pistol cartridges for years. Can't find what you want they give good alternatives. W 748 for BL C, or Varget in the 308 or 4759 vs 4227 in 32/40 & 38/55 good example. However Rifles you can start low work up a load, Cronograph, look at cases for pressure signs, etc. number of ways to stay safe.
Shotguns advice has always been published loads only. That's fine for modern guns, Older doubles, powder shortages and discontinued powders put me back into the relitive quickness charts. I follow rifle methods, start very low, make sure the wad leaves the barrel, don't switch the other components, and most often try the load in a pump shotgun first. Work up very slowly Cronographing.
Would rather follow published but the powder companies make it more difficult every year.
William
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