View Full Version : 6 vs 7 Ogive
What is the difference between a 6 and a 7 ogive. When I origionally ordered my dies a 7 was suggested for a 55-65 grain 224. Last time I talked to him he said he had a 6 and only had to make the punch for it. Said it would be fine for what I wanted. Also said if I wanted a 7 he couldn't give me any estimate when he would have any ready. I said go ahead and do the 6 - did I make a mistake? I will be using rimfire jackets.
phil218b
05-12-2009, 11:21 PM
6 is a little less taper than 7 for rimfire jackets it will put less stress on the jacket when point forming. I don't think any ballistic difference would be noticable. The dies I use for rimfire jackets is a 6 ogive, I have a 7 that I use with commercial jackets for match bullets, I don't think I can hold my rifle still enough to make a difference while bench shooting let alone freehand.
I sent a pm and will send you some info. I need your email to attach it.
shooterg
05-13-2009, 02:38 PM
I can't resist - the difference is 1 ogive !
FWIW- my Blackmon dies are 7 ogive and I'm plenty happy with the 50 to 56 gr. bullets I've made and shot in an AR15.
I can't resist - the difference is 1 ogive !
FWIW- my Blackmon dies are 7 ogive and I'm plenty happy with the 50 to 56 gr. bullets I've made and shot in an AR15.
Har har har - Thanks - now I get it. So I could use a 3 and a 4 ogive and have a 7 ogive. Makes perfect sense.
What are the min and max bullet weights your 7 can make. Mine is from Blackmon also. Anyone know the weight ranges for a 6 using rimfire jackets?
Thanks phil218b - that info helped a bunch.
MIBULLETS
05-13-2009, 06:30 PM
I have a 6 as well from Corbin. I can make anything from a 45 gr up to about a 68 gr lead tip on them. You could probably make a 58 - 60 gr bullet without the lead coming out of the tip. You can't fit as much lead in the 7 because the jacket will be tapered more. The 1 ogive difference will not make a hoot of difference. Benchrest guys always want something in the 7 - 8 ogive. I suppose to resist the wind and air drag a little more, but you probably wouldn't see a difference out to 300 yds.
shooterg
05-13-2009, 06:42 PM
If I go to 60 gr. with long rifle rimfire jackets it starts to look like a wadcutter in my 7 ogive . I've made a bunch of 51's to 56's but I believe I could make a really light bullet with .22 short jackets - don't have any and don't have anything to shoot 'em in so haven't tried.
The sample bullet that came with the dies was 55 gr. Looks like the lead is just below the opening so I don't think I could get much heavier - would like to have been able to make 62s.
shooterg
05-22-2009, 08:20 AM
Go ahead and try some 60-62. They do look kinda like a wadcutter but they shoot fine and the groundhog won't know he was killed with an ugly bullet !
I'll give it a try - Thanks
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