Sirs,
I am a gunsmith, FFL, instructor and master machinist. I ordered a brake for my
Remington M700 SPS 300 Win Mag 26″ bbl. As for the product. Machining and finish,
A+. It is beautifully made. You do need to put a .015″ corner break on the mouth
of the barrel bore to ease installation. Fit A+. It installs as a “firm” slip fit
with a small dead blow. As for shooting, let’s put all the science aside and
observe the shooter. Everyone has different recoil tolerance. I rate nominal
recoil effect of guns and calibers based on close observation of an average
occasional shooter. When their facial tension and muscle twitch due to shot
anticipation, doubles their average group size, they have “run out of” recoil
tolerance. On a scale of common calibers ( .22WMR, .45 mag pistol in a lever rifle,
.223, .243, 30-30, .308 win, 30-06, 45-70 govt +P, 7mm mag, 300 win mag.) The
average shooter runs out of recoil tolerance in 5 rounds or less with the 300 win
mag, but may be able to shoot 50 or more rounds of the 22 WMR with good control. THE
KAHNTROL BRAKE moves the recoil of the rifle from the 5 round (300 win mag) spot to
somewhere between the .243 and 30-30 (maybe 20 rounds) range for the average,
lightly trained shooter. My daughter shoots a Thompson 30-30 with a managed recoil
round for deer hunting. I would not hesitate to let her shoot the Kahntrol 300 win
mag, as a safe alternative. Great product, that works as advertised.