Please help with 6.5 gap

[whatwind?]

I think standard 6.5 gap 4s chamber is .296 nk

 

[Just4fun]

I understand all of that but the whole thing that makes me confused is why will one die work fine and one die doesn’t
Both the same die same bushing and same brass and my buddy isn’t neck turning my brass when he sizes it

 

[Just4fun]

Here is groups with my buddies die

 

[Just4fun]

Here is with my die same load same day

 

[Just4fun]

So the more I think of it the only difference between the brass he sized and the brass I sized is mine was tumbling with ss media and his was not so maybe lubing the necks will fix it
I dont know

 

[David Christian]

So the more I think of it the only difference between the brass he sized and the brass I sized is mine was tumbling with ss media and his was not so maybe lubing the necks will fix it
I dont know

Can you measure the thickness of your necks in 3 different places on the circumference and let us know what you find?

 

[Just4fun]

Ok so right at the top it’s .2955
Mid neck is .2955
And bottom neck by shoulder is .2955
All unloaded
And loaded it’s .2970-.2975

 

[David Christian]

Ok so right at the top it’s .2955
Mid neck is .2955
And bottom neck by shoulder is .2955
All unloaded
And loaded it’s .2970-.2975

@Just4fun, sorry, can you measure the thickness of the walls in 3 places, not the diameter. Do you have a ball mic, or at a minimum use your calipers. Like this:

Ok so right at the top it’s .2955
Mid neck is .2955
And bottom neck by shoulder is .2955
All unloaded
And loaded it’s .2970-.2975

Sorry, measure the thickness of the brass like this:

or this:

 

[Just4fun]

Ok so I measured about 10 with and the are all the same at .0155
And I just tried to load some lubing the necks and it still dented the tip and the seating was 13 thou difference from one to the next

 

[Just4fun]

Here is the results of the ones I just lubed then tried so I started at .2955 and loaded is .2970 and still dented them

 

[Just4fun]

Here is what I’m loading for guys.
She turned out absolutely gorgeous I think.
But the loads are driving me bonkers trying to figure this out.

 

[David Christian]

Ok so I measured about 10 with and the are all the same at .0155
And I just tried to load some lubing the necks and it still dented the tip and the seating was 13 thou difference from one to the next

Something is not adding up.

.0155 x 2 = .031
.031 + .264 = .295 (combined components)

should be a smooth fit.

Or from your seated diameter, .297 - .031 = .266

Bullet should be loose.

Where is the math off? Sorry, but are your bullets .264?

 

[Just4fun]

Yes. They are. Like I said I’m baffled myself all the measurements are identical to my buddies one loads perfect one dents the tips

 

[David Christian]

For giggles, can you mic the actual bullet?

 

[Just4fun]

Yes it is .264
Maybe I should send my die to Redding I don’t know what else to do. But all the measurements check out that what doesn’t make sense

 

[whatwind?]

I would trim the necks, I think the “no turn” reamer is 298 and you have a hunting set up that should have more clearance

how much powder are you using and what is your cbto and coal

maybe crunching powder

 

[whatwind?]

here are loads for my rifle plus others i have compiled, just for info...attached

 

[Just4fun]

So yes your right. Fired they are .298
And 59.5 grains and I did think about the crunching so I tried to seat Bullets without any powder and I’m still getting the same problem denying the bullets.

 

[Lone Hunter]

J4f, It looks like you have everything covered but have you looked at your seating stem? I had to order the one for the VLD seater as mine marked the bullet like yours but not nearly as bad, just a ring no crimps. I remember the seating depth would vary on each bullet also. It might be worth a try. This is very puzzling as the math adds up but I don't understand the hard seating and crimp ring on bullet.

 

[whatwind?]

So yes your right. Fired they are .298
And 59.5 grains and I did think about the crunching so I tried to seat Bullets without any powder and I’m still getting the same problem denying the bullets.

one issue identified, necks need turning to .014 at least, next just get a new sizer, the cost compared to rest of components is very little,,,,maybe redding will take it back as credit...