6s ogive or 7s ogive?

[Utah Shooter]

I know that I need to do a bit more digging myself but just curious. What one would you go with if you had the chance?

[jameslovesjammie]

7, but I also shoot at 300+ yards with a bolt gun. If you are just poking holes in paper at 100 yards, it doesn't matter at all. The 6 may even feed better if you are using a semi-auto. I am assuming you are talking .22 cal.

[Utah Shooter]

Yeah I am. Sorry. I have a semi auto but I do want to be able to make the more accurate projectile. Of course some paper shooting at 100 but accuracy really is the key.

[MIBULLETS]

I think I would go with the 7 S. Not really a lot of difference but the higher ballistic coeficient interests me. If I had more choices than 6 or 7, I would actually get a 8S.

[Utah Shooter]

So the higher the ogive the better the BC?

[DukeInFlorida]

6 will load better in a semi auto AR15 type gun.

[Reload3006]

my .224s are 8s and 10s but I am shooting a bolt gun and heavier bullets. If I planned to make bullets 55 grains and under I would have a 6s But as my lightest is 62 I really like my 8s the 10s is for 70 and up

[GerryM]

A 7ogive is very good to 200. The 6 is more wind sensative at 200 due to its shape.
The 7 is ok for all around shooting to 200 yds .
I make bullets with 6, 7 8 and 10 ogives. The farther out you want to shoot the sharper the point [Ogive] should be. The 6 is wonderful at 100 so take it from there.
I like the 8 ogive best for all around it seems to be Just enough for my type of shooting.

[Grandpas50AE]

6 will load better in a semi auto AR15 type gun.

I agree with you. Under 70 gr. the longer ogive will result in less shank (bearing surface) area, which makes adjusting the OAL a bit tricky. Unless the OP is going heavier (70+ gr.) I would also stick with the 6s.

[MIBULLETS]

So the higher the ogive the better the BC?

Yes generally that is true assuming that the opening at the tip is constant size.

[Wolftracker]

I have a 6S point former for .224 that gives me alot of leeway as far as weight and bearing surface goes on my bullets. I tell friends, if they ask, to adjust their sights to the bullet, not the bullet to the sights. In other words, BC is less important than the quality and potential accuracy of the bullet you are using. So what if one style drops more than another or is more affected by wind. Dope your sights accordingly for wind and bullet drop and if your bullet, rifle and aim is of good quality you will do well. My 6S bullets, while not up to benchrest standards, shoot well enough for me way beyond 100yds. Just my in-expert opinion, but I think BC is way over rated. There are many factors involved in supreme accuracy, bearing surface, twist rate, velocity, jacket concentricity, bullet balance and outside conditions to name a few, that have much more to do with performance than BC. Pointier does look cooler though!

[DukeInFlorida]

Bullet seating dies do not push on the end of the bullet.
They push on the curvature of the profile of the bullet. And the same weight bullet, with different profiles (6S vs 7S), will have the bullet seating ring pushing in different places (between the two curvatures).

The actual overall length isn't as critical as is the precision with which you form the swaged bullets.


Yes generally that is true assuming that the opening at the tip is constant size.

[Utah Shooter]

Well the whole reason why I ask is I have a set of Corbin R dies with 6s and am seriously contemplating upping the quality of my dies. It seems that most of the Carbide dies come with a 7s.

[DukeInFlorida]

Go for it!

I ran a thousand 6S swaged bullets through my AR with slidefire at the car shoot a couple weekends ago. All of the 6S cycled perfectly at 720 RPM.

at the beginning of this video, that's me in the white hat, and black shirt, at full speed:
http://youtu.be/QVgo-I5GVtg

[BT Sniper]

Duke,

COOL!

Original poster,

The difference between 6s and 7s so slight it would be hard to tell with the naked eye.

Here you go. AUTOCAD drawing of a 6s and 7s 22 cal ogive. The difference in nose length is .037 between the 6s and 7s with a .062 meplat.

http://i636.photobucket.com/albums/uu87/BTSniper/6svs7s.jpg

Either choice you choise I'm sure will feed, function and shoot great from whatever you wish to shoot it from.

Good shooting and Swage On!

BT

[BT Sniper]

I'm not sure the exact numbers of the physics involved but the 7s will obviously have a shorter barring surface but not by much. Just because the nose is longer by .037 I think the barring surface would be affected by a number less then that.

BT

[BT Sniper]

1.34" radius / .224 = 6s
1.56" radius / .224 = 7s

My 22 cal dies have a 1.4" radius just to make the numbers easier and equals a 6.25s ogive. My 9s has a 2.0" radius equal to a 8.9s ogive.

BT

[GRUMPA]

Either I'm paying closer attention lately or constantly reading this stuff is starting to sink in. That 6s and so on is just now starting to make some sorta sense. Thanks guys

[BT Sniper]

Glad we could help out. It is fun playing with all the numbers and computer aided drafting sure makes it easy to experiment with different bullet designs.

Good shooting

BT

[DukeInFlorida]

From a swaging standpoint, I'm very happy that I went with the 6S.

[shooterg]

As far as running in the AR, the 7S dies from Blackmon I use run fine.

[Utah Shooter]

I have not had a problem shooting them through my AR either. I just got some made from Rorschach Dies. Will see how they shoot and feed on Sunday.