Pistol cartridges can be very sensitive to seemingly small changes in bullet weight, COAL, and primers/powder changes. So I would approach this one very carefully.
Is there any load data for a 180gr jacketed bullet that you can compare against? The pressure generated for a lead bullet will be less then a jacketed bullet. I would feel comfortable using the start charge for a 180gr jacketed bullet and substituting a lead bullet.
Load five or ten rounds and check for function and pressure signs before proceeding with the batch.
As a rule of thumb if there is no load data available I will typically try and go the next bullet weight heavier, and with cast, I’ll look at the jacketed data of the same bullet weight. With monolithics I go to the next bullet weight lighter.
If there’s no load data period, I break out QuickLOAD. Hell, sometimes I breakout QuickLOAD when theres load data. :-)
Reloading...it’s like knitting for men.
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