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Gentlemen, I am about to embark on reloading my first 470 Nitro cartridges. In light of the fact that this is not a magazine cartridge; is it necessary to crimp the shells? Do you see any type of movement in the bullet of the non fired shells after the first has been fired? A second question; Do most of you use necking dies in lieu of full length dies for sizing? I only have one gun for this cartridge. EZ | ||
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I always full legnth size the smallest amount possible. Never seen a neck die in 470. I do a slight crimp in the cannelure. With some of the testing I have done it appears that I am able to keep the SD down a little more than if not crimped. Mac Mac | |||
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I never do. With the large bore flanged nitros, just make sure your expander isn't oversize. If it's the one that came with the dies, it will be. I just remove and toss. Whether you crimp or not, test when working up. Mark one cartridge and rotate it to the off barrel for 10 shots. If the bullet moves, reduce expander ball some more. Crimping won't cure it.  ------------------------------------ "Serious rifles have two barrels, everything else just burns gunpowder." | |||
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I don't try to do anything other than just load to my normal specs which is to crimp everything. I full length resize as that's what the dies are and try each round in each barrel. Just load to factory specs more or less using Rl-15 and dacron filler and have never had any problems. I use RCBS dies and they came with crimp. SCI Life Member NRA Patron Life Member DRSS | |||
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I use very little crimp or none at all! Rusty We Band of Brothers! DRSS, NRA & SCI Life Member "I am rejoiced at my fate. Do not be uneasy about me, for I am with my friends." ----- David Crockett in his last letter (to his children), January 9th, 1836 "I will never forsake Texas and her cause. I am her son." ----- Jose Antonio Navarro, from Mexican Prison in 1841 "for I have sworn upon the altar of god eternal hostility against every form of tyranny over the mind of man." Thomas Jefferson Declaration of Arbroath April 6, 1320-“. . .It is not for glory, nor riches, nor honours that we are fighting, but for freedom - for that alone, which no honest man gives up but with life itself.” | |||
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I crimp...lightly...in the groove. Gary DRSS NRA Lifer SCI DSC | |||
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After a problem caused by not crimping on my first trip to Namibia, I now, at least lightly crimp everything. I never heard of anyone necksizing a nitro express cartridge. You can borrow money, but you can't borrow time. Don't wait, go now. Savannah Safaris Namibia Otjitambi Trails & Safaris DRSS NRA SCI DSC TSRA TMPA | |||
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Hi EZ: Yepper going with the boys. Full size, and light crimp, always works. PAH The Hunters Hut Firearms Sales & Service PAHunter/ The Head Hunter DRSS,NRA,SCI,NAHC www.huntershut1.com | |||
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I will concur those the other guys. I load and lightly crimp jacketed bullets in my .500 NE. You should try cast bullets for your .470. They are MUCH cheaper with lots less recoil and a real pleasure to shoot. Welcome to big bores. Have fun!!! | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Double Rifles Crimping cartridges for double rifle use
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