You probably don't want to drive those soft lead SWCs very fast, or you'll encounter heavy bore leading. First & foremost, make sure the bullets are a good fit in the chamber throats. 7.5 grs Unique will get those 265s approaching 900 fps in a 4" bbl, and you should find that has plenty of snoose for your sporting needs. Remember, it's a Special, not a Magnum.
Shoot safe.
Larry
Get some W231/HP38 and try 6 ~ 6.5g under that bullet - you'll like it.
So far, I've only found one load for a wadcutter and it's the Lyman 429348 at 180 gr. It looks very similar to this 429352 that weighs 245 gr.
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There's also a 429398 that weighs 248 gr and looks like this:
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I suppose the alloy could make the last two weigh 265 gr, if they're almost pure lead.
The solution to increased pressures is to just load them at SWC depth, more like a LBT bullet would be loaded.
Not to step on any toes, but this load is hotter than a lot of 240gr SWC loads for 44 Mag! And it IS hotter than any 44 spl load that I can find for that heavy a bullet. With a 265gr bullet, not to mention LWC (seats much deeper than a SWC), this is a recipe for disaster in a 44 spl case.
This too, is way too much. This IS a 265gr LWC after all.
Hodgon lists a max load for HP38 of 5.2gr for a 240gr SWC.
Lighter bullet, not seated nearly as deep.