I just got finished pressing my first 200 rounds of .357 Sig.... Wow... Fun! A little maddening! But fun!
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Holy Carp! I made Ammo!
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Congrats, be sure to let us know how they shoot! Get ready for the disease. -
You need to guide the bullets into the seating die with your fingertips as you raise the ram.
Make sure that the expanding plug in the 2nd die is adjusted down far enough to flare the mouth of the case just enough for the bullet to sit inside of the flare and not tip over. Don't flare it too much, just enough for the bullet to sit in it without tipping over, the more you flare it the more you work the brass, which will cause it to work harden and lead to early failures due to splitting.Frank
One rifle, one planet, Holland's 375

Life Member NRA, CRPA and SAFComment
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Might want try belling the case mouth a bit more the roll crimp die will remove the bell.
XL-650 to feed the: .45ACP's Les Baer Concept V, Ruger SR 1911, Ruger Nightwatchman,custom built Colt M1911, Springfield .45ACP Loaded.. 9MM SA Range Officer,Ruger P-85, Springfield Stainless 9MM loaded, SA 9MM 5.25" XDM, Springfield 9mm Stainless Range Officer, STI double stack .45ACP.
IDPA A41750 Safety Officer
NRA Certified RSO
"Stay out of the deep end of the pool; correct the problem with your credit card, not your dremel!"Comment
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357 Sig is a bottle necked cartridge no? Does it have an expander die to bell the case mouth? You would think it would be sort of like rifle ammo needing to decrease the case mouth diameter.Comment
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The sizing die expands the neck. Check your die. Like the post above hold the bullet and ride it into the seating die.Comment
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