Quote:
Originally Posted by fredj338
Yes & no. OAL in small volume pistol rounds, like 9mm & 40, with fast powders, like faster than W231, can be problematic. In the larger revolver cases with medium to slow burning powders, OAL just isn't moving the pressure needle much, especially if not loading to max. Of course something like a 148gr WC is NOT the same as a 150gr SWC, but in general, the heavy bullet data for lighter bullets works fine & OAL doesn't affect much. Load to the crimp groove. If the OP is using 200gr LRN data for a 190gr LFP, as long as he isn't starting at max, he should be fine.
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What you say about 9mm OAL is true however I would say the same analogy applies to using 190 grain or 200 grain bullets in 38 special. With a 190 grain bullet you will have as much of the bullet in the case as you would with a wadcutter fully seated and maybe even more. Using 200 grain data should be fine. I would expect pressures to increase much faster going up in charges weights than they would for your average 38 special load.