This will be my first rifle build. Trying to decide which 338 caliber to go with. Currently shoot a 300RUM. I have a Defiance Rebel Action and a 338 Bartlein Varmint 1:9.3 barrel so far. Still have the rest of the components to order. Any suggestions on stock, bottom metal, trigger? I definitely want an adjustable cheek piece on the stock. I'm unsure about the bottom metal. I would prefer not to single feed. What's out there that fits the long oal of 300 grain Berger's? Thanks for your suggestions and opinions!
338 Platform Rifle Build
- Thread starter David F
- Start date
Help Support Long Range Hunting Forum
LongBomber
Well-Known Member
What bolt face do you have in your action?
.545 with a bolt diameter of .750
adam32
Well-Known Member
338 RUM.
LongBomber
Well-Known Member
In that case 338 edge, bdl bottom metal and a 4" wyatt mag box.
I just had a 338 rum built. 28" proof barrel. Had terminus helios action modded for 4" box. Shooting 300 Bergers @ 3.9" on lands. I ran a ladder of RL33 from 88-102gr, top charge was 2874 fps, and barrel isn't broken in. It showed ejector, but 100g didn't and was 2802, that'll speed up to 2860 or so once broken in. That's faster than most 338 lapuas. The edge will get you another 30-50 fps, maybe. There's nothing wrong with a 338 rum, great cartridge in my opinion. If I did it all over again, I'd probably go 338 norma improved as it gets same velocity in a 26" barrel with a bit less powder, doesn't need a 4" box and lapua brass is freaking great.
I'd do an edge like longbomber suggested. Had edges for 15 years and will always have one. Great accuracy and performance if you reload. Any will work well though
waspocrew
Well-Known Member
I also had this debate and went 338 RUM. I've been happy with it.
clemens
Well-Known Member
338 rum Brass more readily available these days?
338 rum for me. 30 inch pipe ran 285's @ 2860 FPS w/r33. 3.600 coal
Adg just sent a bunch out to retailers, it's good stuff.
Wolf76
Well-Known Member
You basically can eliminate the Lapua due to the BF.
The edge makes the most sense because they make 338 edge brass and you can make it from 300 rum brass. With the Wyatt's mag extension, there's no reason to single feed. The 338 rum was lacking any brass for a long time and leaves some velocity on the table. Not a big deal until you get to the 300+ gr bullets.
The edge makes the most sense because they make 338 edge brass and you can make it from 300 rum brass. With the Wyatt's mag extension, there's no reason to single feed. The 338 rum was lacking any brass for a long time and leaves some velocity on the table. Not a big deal until you get to the 300+ gr bullets.
Last edited:
