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To crimp or not to crimp, & seating depth??????
#15821
08/21/2006 3:49 AM
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Joined: Jan 2004
Posts: 2,399
Vance in AK.
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Pooh-Bah
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OK guys, starting to get serious with the .358 Bellm in my Contender. Two questions. #1, on bottleneck cartridges, when starting to work up a load do you usually crimp & if so how tight? Do you wait until you get a sweet load & then start messing with crimp pressure to see if you can improve?
#2, where do you start on bullet seating depth? I'm shooting 200 gr Hornady SPs, & have the OAL set so they are just off the rifling. I'm probably .100-.120 off the cannelure. My goal of course is max. velocity @ min pressure. Am I starting in the right place? Most of my reloading experience for the Contenders is straight walled cartridges, so this is new country for me.
Vance in AK.
Matthew 6:33 "But seek first the kingdom of God and His righteousness, and all these things shall be added to you."
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Re: To crimp or not to crimp, & seating depth??????
[Re: Vance in AK.]
#15822
08/21/2006 10:40 AM
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Joined: Jan 2004
Posts: 402
jim257
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when i was loading for the 257 roberts,7-08,and 30-06 in the encore i never crimped my rounds.i only neck sized the brass and then i would turn it a half turn and put it in the sizing die again.(lee actually recomends this)never had any problems with loose bullets or accuracy...jim257
get-r-done
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Re: To crimp or not to crimp, & seating depth??????
[Re: jim257]
#15823
08/21/2006 4:14 PM
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Joined: Jan 2004
Posts: 2,399
Vance in AK.
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Pooh-Bah
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Thanks Jim, I didn't think a crimp would be neccesary. Can I ask what the point was in rotating the case 180* when sizing?
Vance in AK.
Matthew 6:33 "But seek first the kingdom of God and His righteousness, and all these things shall be added to you."
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Re: To crimp or not to crimp, & seating depth??????
[Re: Vance in AK.]
#15824
08/21/2006 7:08 PM
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Joined: Jan 2004
Posts: 402
jim257
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according to lee it makes a more consistant and tighter neck if you rotate it and run it in the die again ,ive always did that( even for long guns)...jim257
get-r-done
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Re: To crimp or not to crimp, & seating depth??????
[Re: jim257]
#15825
08/22/2006 5:12 AM
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Joined: Jan 2004
Posts: 4,461
pab1
Distinguished Expert
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Distinguished Expert
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Posts: 4,461 |
I do the same thing when seating primers and bullets. With the bullet I seat it about half way, lower the round and rotate it, then finish seating. I have noticed an improvement in accuracy since I began doing this.
Experience is the best teacher, hunger good sauce. Osborne Russell Journal of a Trapper
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