gun dreams

[Mortblanc]

(15 April 2014, 10:33)Steve Wrote:

(14 April 2014, 22:04)Tartar Horde Wrote: Agreed Midnitemo shot placement has to be exact, I've always liked the .22 mag, a little bit more oomph without a loud sonic crack, not many about though.

Most 22Mag ammo is well supersonic, so you will get the "crack". I seem to remember a hunting friend found some 60gr sub-sonic ammo somewhere, but it was innacurate. The best 22LR sub sonic ammo in my rifle is Winchester Super-X hollow point, it groups about 1/2" - 3/4" at 50 yds. In the field the biggest problem is reading the range and the wind accurately, a tiny difference in accuracy potential between different brands of ammo is not that significant.

I've been trying to develop a sub-sonic load for 308 but not very successfully yet, despite my rifle having a 1-10" twist.

I did some extensive accuracy testing a couple of years back involving 10 different match grade ammunitions in one of my special purpose rifles and found that difference between brands varied from groups of 1/2"@50M to 4'@50M sometimes within the same brands. Eley Sport and Eley Match grouped wildly different, as did two levels of Midus.

My particular rifle shot SK pistol match better than any other brand and scattered Remington Gold tips around in a 4' circle.

Point of impact between brands often varied by as much as 6" even though the individual groups were reasonable.

I discovered that CCI target (also subsonic) gave me almost the same accuracy as the SK Match at half the price, so I stockpiled several thousand rounds and shoot that through almost all my .22lr guns.

I also get good results from the Fiocchi subsonic offering and keep some of that on hand.

When dealing with a subsonic load in .308 one might wish to consider bullets on the heavier side. If speed is limited then weight is the deciding factor in performance on target. The longer bearing surface and high ballistic coefficient might help stabilize in the 1/10 twist barrel.

I have one 1/9 twist barrel that will not stabilize anything less than 165 grains.