38 Special Wadcutter Load in 30 LC Brass

[Clutch80]

I'm doing some loads to shoot out of a conversion cylinder in my 1851 Navy. The instructions for the cylinder are to use 38 Long Colt or 38 Special wad cutters. I've got a good bit of 38 LC brass and want to load 148 grain hollow base wadcutters to get better obturation/grip on the rifling. I haven't found any 38 LC load data for 148 grain wadcutters, but have the data for 38 special. The question is if it is safe to load the wadcutters in the 38 LC brass using the COL and powder charge listed for the 38 special loads. It seems to me that the space inside the case of the 38 LC with the bullet protruding 1/8 inch out of the case would be the same as in the 38 special case. The pressure listed in the Lee manual for the 38 special wadcutters is actually less than for the 150 grain round nose that I have been loading in the 38 LC brass so I think I'm safe there. I thought I'd bounce my logic off some experts before loading them. These are not hot loads by the way.

[gregintenn]

You'd be fine assuming the "combustion chamber", for lack of a better term, is of the same volume.

[Clutch80]

That's what I was thinking.  Thanks