Re: Suppressed 338 Rifle Questions
Cut it down to 18" and use a reflex supressor that is about 12" long. It will add perhaps 8" to your overall length putting you right back to your original 26" length.
You are not likely to get that 340 WM loaded to a subsonic speed with all that case capacity to deal with. I assume you intend to shoot supersonic loads but with a reduced muzzle report. You will of course have the supersonic crack of the bullet flight.
I was kind of surprised at the growing number of folks that buy supressors to shoot on full house rounds. I didnt understand the mindset at the time, but it makes more sense to me now. The accuracy and effective distance of a supressed subsonic rifle round is ridiculously reduced as compared to its supersonic counterpart.
On a supersonic rifle, a supressor makes a great muzzle brake and flash hider while significantly reducing the muzzle report. The bullet flight is loud, but it is very difficult to determine the origin of the shot. Some velocity may be lost (a few hundred fps) but the overall effectiveness (accuracy and energy) of the round is still there.