
Originally Posted by
Private R Wiggum
hmm... plated bullets are made from cold swaged soft lead cores, measuring 0.356"...
do not over crimp and do not undersize your bullet with your dies... meaning you don't want your finished bullet measuring something like 0.354" inches - or you will keyhole, lose accuracy, and may foul up your barrel. crimp enough to take the bell off from the expander die operation.
also with either dummy rounds or live rounds, manually cycle them from your magazine and measure with your caliper if there is any set back. or you could do a 'thumb pressure' test with either a digital postal scale or even bathroom scale and measure. remember that your bullet is held in place by neck tension from sizing the case, and not so much from the crimp.
the key measurements I would be looking for in your finished rounds are this: bullet's measuring 0.355" - 0.356", no more than 0.001" - 0.002" of set back from a 30 - 40lb 'thumb pressure' test + cycling through your gun (preferable zero bullet set back), over all cartridge length of at the very least 1.135" inches... saami spec o.a.l. is 1.169" inches, most guns cycle them fine. I personally like to load mine on the long side, up and including the max o.a.l. depending on load... also measure the length of your bullet, in theory it should be seated around 0.20" inches deep behind the brass no matter what kind of style of projectile you are running.
the key is to measure everything with a caliper to maker sure your dies are set up properly - measure and measure again! you must be paranoid when reloading.
no room for a press??? try the Lee Precision Bench Plate #90251
are you using the Lee 3 or 4 die set? what kind of gun are you running? what's your goal in reloading? (for target/plinking? self-defense?) and don't forget to weigh and re-weigh your charges!!!
best
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