Dumb new Lapua brass question

[DIANEB]

Should I size and trim new Lapua brass?
The brass seems a little hard to size...

Thanks in advance ??

[603 Country]

[DIANEB]

Thank you...

[37L1]

I mandrel the neck and chamfer. No trim or full length size.

[Pwrbomb1970]

[DIANEB]

I mandrel the neck and chamfer. No trim or full length size.

Thanks...

[Klem]

I size for consistent neck tension and chamfer inside necks

[603 Country]

[Dt219]

[DIANEB]

You guys are all great help...
Thank you all...

[Zeneffect]

Yep, just straighten out the necks. Lapua brass should already be trimmed and chamfered new but will get neck dents from shipping..

[Old Bob]

I'll chime in for the neck straightening chore for new brass. I've never had a bunch of new brass that didn't have some pieces with dented or oval shaped case mouths. Used to do a full case sizing, trim & chamfer of the whole lot but found just running all the cases over a mandrel would clean up any bad case necks. What I do then is measure the case lengths to see if any need trimming. Will still chamfer all cases. If any shooter wants good, accurate ammo, you gotta do this.

[DIANEB]

I'll chime in for the neck straightening chore for new brass. I've never had a bunch of new brass that didn't have some pieces with dented or oval shaped case mouths. Used to do a full case sizing, trim & chamfer of the whole lot but found just running all the cases over a mandrel would clean up any bad case necks. What I do then is measure the case lengths to see if any need trimming. Will still chamfer all cases. If any shooter wants good, accurate ammo, you gotta do this.

Ok I did everything you posted and they all are looking great...
One more question, the flash holes are kinda small should I do anything to them?
Thanks again
.

[Klem]

Ok I did everything you posted and they all are looking great...
One more question, the flash holes are kinda small should I do anything to them?
Thanks again
.

No need, Lapua finish of their flash holes is as good as any.

There is an online debate by the long range/bench-rester shooters as to whether Lapua drills or punches their flash holes, and whether that is even an issue. Bryan Litz in his Modern Advancement Volume II reportedly claims they are drilled (I have never read this book). My thoughts are it does not matter as we only worry about whether there is any need for internal chamfering. I have never seen the need to do this with Lapua; their quality control and finish is excellent and no doubt why they are the preferred brand for high-end competition.

If you are concerned about their 1.5mm (0.059") holes being small then it's perfectly fine for primer spit. The only time primer holes are an issue for me is if you tumble in walnut media after removing the primer. if your media is small enough there will be pieces clogging the occasional hole. You can easily check by holding cases up to the light.

European small primer holes 0.059" are a bit narrower than the US 0.062" but Grendel die manufacturers have deprime stems that cope with this without sticking.

No need to drill wider and in fact this may be dangerous. No need to chamfer. I read online that Jack Nary did a test of 6BR flash holes seeing if chamfering or drilling made any difference to results on target. With Bench Rest guns you can see if these minimalist efforts make a difference. Apparently, they did not. So, if Bench Resters can't see a difference then we won't either.

[DIANEB]

No need, Lapua finish of their flash holes is as good as any.

There is an online debate by the long range/bench-rester shooters as to whether Lapua drills or punches their flash holes, and whether that is even an issue. Bryan Litz in his Modern Advancement Volume II reportedly claims they are drilled (I have never read this book). My thoughts are it does not matter as we only worry about whether there is any need for internal chamfering. I have never seen the need to do this with Lapua; their quality control and finish is excellent and no doubt why they are the preferred brand for high-end competition.

If you are concerned about their 1.5mm (0.059") holes being small then it's perfectly fine for primer spit. The only time primer holes are an issue for me is if you tumble in walnut media after removing the primer. if your media is small enough there will be pieces clogging the occasional hole. You can easily check by holding cases up to the light.

European small primer holes 0.059" are a bit narrower than the US 0.062" but Grendel die manufacturers have deprime stems that cope with this without sticking.

No need to drill wider and in fact this may be dangerous. No need to chamfer. I read online that Jack Nary did a test of 6BR flash holes seeing if chamfering or drilling made any difference to results on target. With Bench Rest guns you can see if these minimalist efforts make a difference. Apparently, they did not. So, if Bench Resters can't see a difference then we won't either.

Ok thanks, I was just curious after reading all the pros and cons on the flash holes...