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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
  • shotshell reloading
  • bullet reloading
The Ultimate Reloading Manual
hornady superperformance

Data for Unknown Bullets

Author: John Barsness / Wolfe Publishing Co.
Date: Oct 01 2007

It’s not unusual to find that data for a specific bullet and powder isn’t listed here, even though we try to list every published load. That’s because new bullets appear almost every day, and some have never been tried with certain powders.

It’s best, of course, to use data for the exact bullet you’re using whenever possible, even if it’s the same weight as some other bullet listed. For instance, Swift A-Frame bullets tend to create slightly higher pressures than conventional bullets of the same weight and diameter. This is because of their pure copper jackets, which are softer and hence create more friction than the typical “gilding metal” of most rifle bullet jackets. But the Swift manual only lists so many powders. Here the logical thing to do is to look up data for another bullet of the same weight and diameter, say a Hornady, and reduce that data 5 percent for loading A-Frames.

The same procedure can be used when looking for data for a cast bullet that isn’t listed. Cast bullets tend to create somewhat more pressure than jacketed bullets, because they’re softer and tend to seal the bore more tightly. If you can’t find data for a cast bullet in any cartridge, use jacketed bullet data, but reduce it at least 10 percent. In fact, this is a smart thing to do when using data that isn’t specific to any bullet, because powder can vary considerably from lot to lot.

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