Quote:
Originally Posted by 358156hp
Isn't the 360271 a 38 S&W bullet? If so, it may need considerable sizing to chamber. I seem to recall them being cut to drop .360 with pure lead & 2% tin.
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You have a good point about the diameter & possible need for sizing bullets down more than is desirable for the most accurate bullets. I ignored the diameter portion of the mold name because Lyman has changed the diameter in the name of many their molds over the decades without actually changing the molds. The .38 mold I loaded into my model 39 had number XXX311. I forget what diameter was used in its name.
At the risk of repeating what everyone already knows, we need a little clearance around the case for it to release the bullet and not too tight a fit of the bullet in the lead to avoid pushing it back into the case to avoid excessive pressure.
On the topic of 9mms & cast bullet diameters, I've seen the accuracy of Browning marketed P35 Hi-Powers improved a lot by changing from 9mm molds to .38 molds. All of them I've seen measured had .357" groove diameters, unlike the Hungarian made copies which typically run .355".