Lapua virgin case prep

[GrayRyder]

Whenever I first use Remington brass I run it through a re-sizer to round out the case mouth and then inside/outside chamfer the mouth. Remington brass is noticeably different from Lapua and often looks dinged up. Lapua brass looks pretty good, no dings - should I run it through the re-sizer? I know it couldn't hurt but it doesn't look necessary. thanks

 

[Brux]

I do that with all brass

 

[Steel head]

I always run a mandrel through the neck to get proper neck tension.

 

[plinkin]

Here's a quick run down of what I do with my new 6.5x47 brass, use a km expander mandrel which expands it to .264 thou and takes out any dings use dry neck lube (less clean up), then run through a Redding FL bushing size ( it just sizes the necks since this is new brass and it chambers fine) then prime and apply another dry neck lube and load your rounds like normal. Idk if it's the 6.5x47 but with a new pva barrel, new brass, fgmm primers, 37.1 of varget and 140 hybrids I was getting 5fps sds ON NEW BRASS love it plus half moa consistently. I tried just loading the cases straight out of the box but the neck tension was too tight. After the above steps it went from 3 thou to 1.5 thou of consistent tension.

 

[Temper]

Some of my lowest ES's and best groups have been shot with virgin, unprepped Lapua brass. I don't bother doing anything to them until they're 1x fired. In my case the 6.5x47 brass is VERY uniform out of the box, around +/-.001 variance in neck thickness and OAL. I just load, shoot and afterwards I'll chamfer/deburr once I'm resizing. The 308 brass tends to have more OAL variance but still very consistent necks. Those I will uniform with a trimmer, then chamfer, deburr and then load and shoot.

 

[Supersubes]

Yes, you should. Their inside chamfer can be kinda shitty too, so do that as well.

 

[High Desert duck]

I run it over a mandrel and chamfer the inside. All the virgin Lapua I have used has been pretty tight on the neck.

 

[Steel head]

I run it over a mandrel and chamfer the inside. All the virgin Lapua I have used has been pretty tight on the neck.

ADG is the same, super tight necks.
All the new brass I’ve ever bought could use some neck expansion.

 

[Dthomas3523]

1: run through mandrel
2: turn necks to consistent size
3: under size with bushing
4: mandrel back up for neck tension
5: trim/chamfer

I have a 21st century motorized lathe, so turning necks is stupid easy/fast. If you don’t, just take out those steps.