need help with consistancy or .308

[dave338]

loading new lap brass trimmed to 2.008
amaxs 168gn
reading comp dies on a t7 press

just loaded five to check seating depth and results are not as consistant as i hoped any ideas ??
1. 2.227 to og using hornaday gauge and dig caliper
2. 2.226
3. 2.232
4. 2.232
5. 2.232
i am doing somthing wrong just cant figure it out
loaded another five and get the same sort of spread?

 

[427Cobra]

Re: need help with consistancy or .308

Did you pre sort all the bullets, manufatures don't just use one mold when making bullets, and no too molds are exactly the same, what your seeing is the difference.

 

[jasonahull]

Re: need help with consistancy or .308

seperate by Ogive.

 

[Suasponte]

Re: need help with consistancy or .308

Check just the bullets themselves prior to loading! You will see variations in the base of bullet to the ojives! Sort them to that first then seat them by group.

However, the best way to go is sorting by the bearing lengths.

I beleive there is a go how to sticky on the top of the realoading forum.

Bullet sorting and prep

Terry

 

[High Binder]

Re: need help with consistancy or .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: a-hull</div><div class="ubbcode-body">seperate by Ogive. </div></div>

Agreed, the above is what you're missing.

 

[Jer]

Re: need help with consistancy or .308

A guy I know who shoots WAY better than me says don't bother measuring bullets before loading. Seems to work for him so I won't waste my time at my skill level.

 

[427Cobra]

Re: need help with consistancy or .308

I would say that's good advice, but it depends on the bullets being sent downrange, SMK's are very forgiving, VLD's are not.

 

[Jer]

Re: need help with consistancy or .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">I would say that's good advice, but it depends on the bullets being sent downrange, SMK's are very forgiving, VLD's are not. </div></div>

All he shoots is SMK's so maybe that's it. I don't think I would like to buy bullets that required an extra step before loading.

 

[GrimmRoper]

Re: need help with consistancy or .308

I personally dont sort my bullets prior to seating them, but I do measure my brass and make sure that they are all very consistant.

After having used the new Redding dies, I will get different seating depths if my brass is not consistant. I only get a difference of .002 or .003 but not as bad as you are experiencing. Since the Redding die has a stop where your case cannot go further into the die, and from there the bullet is pressed into place the only difference I can see is your brass is not as even as you thought.

Double check your brass.

 

[dave338]

Re: need help with consistancy or .308

thanks to every one,
going back to the start , checking brass , and heads ,
if its all ok will be back
cheers

 

[dave338]

Re: need help with consistancy or .308

hi again
ok re trimmed brass and measured , all seems ok
heads measured using hornaday gauge all ok no big or small diff
pulled die apart looks ok, re set
so loaded up 50 rds started ok, but out of the 50 , 10 have come up short
40 measure at 2.230 to og
10 measure at 2.224 to og

those 10 felt a lot easier to seat
any ideas ??