The larger 338 cal barrel is a #7 unfluted lilja profile. It is totally floated. The receiver is bedded in the action. I torque the action screws: rear 35 in/lb, front 40 in/lb.
No work has been done to the action. It is an older Mark X and is quite smooth compared to the newer Mark X/Daly. The trigger was reworked by Joe at Lawson's here in Tucson.
The long throated 338 RCM ( see pic) with 300 gr Berger 57 gr of RL-17 vel 2550 fps. It isn't as bad as it seems. Retains 3000 ft/lb at 550 yds. Wind drift at 500 yds in 10 mph crosswind is 8.8" (4000 ft elevation) The recoil is very tolerable with this 13 lb rifle. Can shoot 8-10 shots before it gets warm. Cleanup is easier with such a slow bullet speed.
Die set for 7mm/375? I have an assortment of dies on hand including a whidden 338 RCM combo FL/bushing die.
Here is how I made the cases with dies I already had: (from my documents file)
Procedure for necking down 375 Ruger
1) Hornady 338 RCM FL die
2) 300 RUM FL die to taper mouth of case
3) 7 RUM seater followed by FL to reduce neck dia
4) Whidden 338 RCM bushing die with .329 bushing
5) Whidden 338 RCM bushing die with .312 bushing
6) Open up with K and N mandrel, neck turn to .013” neck wall thickness
7) Run brass into Whidden 338 RCM bushing die using .310 bushing
I used the 7mm/375 reamer on the body tube of a 7 rem mag Redding comp die for seating.