Thanks, Roy. I was just able, with ss7mm's help, to figure out the length that Kirby's 3-port slim brake adds to a barrel and since it is quite short (shorter than I thought), I realized that the 52" Stryker Drag System will work for me.
I'm planning on using this essentially as a soft gun case only that'll hold a spotting scope, rangefinder, etc--it'll bascially hold gear for a practice session up in the hills on or near the road. For hunting, I'm a big fan of the Kifaru Long Hunter Hauler with the Gunbearer--very happy with that.
It's for the 338AX with 30" barrel with BAT HRPIC action that Kirby is getting very close to assembling. The 52" is cheap enough that it's not worth trying to make one, although I do a fair amount of sewing (
http://www.longrangehunting.com/forums/f61/tents-backpacking-26738/ ) learned a number of years ago when I was smokejumping.
Went ahead and ordered it (digital desert camo) from Third Generation Shooting Supply. Sure have had good, quick service from those guys.
Haven't heard much from lerch and his compatriots lately. Did they take up short range shooting or something??