Lapua 300 WSM brass
- Thread starter antunRC
- Start date
You're correct sir, I finally got around to fireforming the new Lapua 300wsm brass
I got #172 after one firing......it hurt burning that one case
tvaught
Gold $$ Contributor
start at 66 grains and go up from there is what I'd suggest
Good information. I have been reading for 2 hours to find this
N565, 16.11.2023 lot (slower lot than one I used before)
Lapua fireforming
220gr Berger
31" barrel
Target at 900 yards
Very good case fill with N565
Dan-Schenk
Gold $$ Contributor
What reamer is everyone using? I’m kicking around going to this for f open.
LVLAaron
Gold $$ Contributor
Manson makes one specifically for F class. It's on their website.
Precisionhunter417
Silver $$ Contributor
Dang, I wish I would've known that before I had my custom reamer made. I've only got two dimensions on that whole page that differ. Neck dia and a little less fb.
Looks like some very good data. Just in case someone is interested:
ADG SD: 0.3513
Lapua SD: 0.3504
Can't comment on the brass quality but the data generated indicates good data generation technique .
Has anyone tried h4350 with 220 bergers.
My barrel is 32 inches and I’ll be using lapua brass. Where should I start for powder charge.
My barrel is 32 inches and I’ll be using lapua brass. Where should I start for powder charge.
I tinkered a little but hit pressure signs just as I was starting to hit 2800fps. Powder charge was around 61gr or just north of it from memory. I think H4350 is a touch fast for the 220's and H4831sc is a better option. I run the 220s at 2800fps with H4831sc (64.6gr, 10 thou jump) and it's a lot easier on the brass (ADG). You can't hit super high speeds with the 220s in this cartridge, not unless you're happy tossing your brass after a couple of firings anyway.
This was all done off a 9 twist Brux finished at 32, F-Open setup.
This is the 220s at 700 metres...
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