REDDING DIE SET UP

[CRF4FITTE]

I have a 30 br and am using lapua brass and redding competition bushing dies after loadin 125 gr BIBS I noticed .007 bullet runout, I then sized a case and measured neck for runout .007 I'm assuming I set the die up wrong . alittle help? thanks BOB

 

[waterdog]

How many times have you loaded the brass? If this is the first firing on new brass, then I wouldn't worry too much. The run out will get better........

 

[treeman]

how did you size up the brass? and has it been fired in your chamber before?

 

[CRF4FITTE]

The brass has been shot 3 times I sized them up with a redding tapered expander , my load is 34.8 gr 4198 @ 2962 fps 6 fps ES . I just annealed cases then ran them thru bushing sizer then tapered expander,and re-measured 1 or 2 thousands straighter

 

[RJinTexas]

I never use any kind of expander button with or after using a competition neck die. I'd bet that's were your runout is coming from.

RJ

 

[CRF4FITTE]

Thats what I used to take necks up from 6mm to .308 as per 30 br guide

 

[RJinTexas]

I understand that you have to expand the neck to except a .308 dia bullet. I use a Sinclair expander body with a 7mm mandrels on 6.5-284 Lapua to neck up to 284 Win. I've been told that K&M tools work equally well and some folks like them better. First I wet a Q-tip with Shooter Choice FP-10 and run it in the necks, I also put a dab on the mandrel every now and then. I also use FP-10 for my neck turning. Being your going up several calibers you'd probably be better off doing it in steps, using two different mandrels. I learned this from one of the earlier treads, the gentleman who informed me stated that this is where having a T-7 turret press sure come in handy. I was having trouble with runout when necking up for a friends 7mmTCU and the problem was solved after I stopped using a tapered button.

RJ

 

[AlNyhus]

CRF4FITTE:

Check the neck runout on a fired case that hasn't been sized. Clean the powder residue off the neck,gently) before you check it. We'll go from there, okay? -Al

 

[lmorrison17]

When I made my first set of 30BR cases I expanded using using K&M 6-30 mandrel that does it in one step. The cases bent bad and never did straighten out completely after 13 firings. My next set I made by blowing them out with COW and then turned them. It worked great but I was worried about my barrel. The next set I'll neck up in steps insted of all at once and see how that works for me.
Larry

 

[CRF4FITTE]

Sorry all did not mean to ignore you, I've been out of town . When I ordered my BR barrel I asked for a no turn neck I recieved a .330 neck barrel I with my lack of knowledge sent barrel back and they MCGOWAN PRECISION did what ever to enlarge neck area to make it a no turn neck. Now I have straight cases and crooked necks they graciously took barrel back and are setting it back and making it a .330 neck chamber. I've turned my necks and am now waiting for return of barrel I'll report findings later.