Quote:If cost is a big factor in choosing your target ammo, you might find this graph sort of helpful. It was done by a guy over on rimfirecentral.com
(You need to Login or Register to view media files and links) There's something wrong with this graph. With about any target 22 rifle the 50 yard 5 shot group average should be ~1/2" or less. With good ammunition and conditions it ain't that hard to shoot 10 shot 100 yard groups under 1". This graph starts at .4" at 50 yards, and goes up from there. Either it isn't a very good rifle, or the shooter is inexperienced, or????
Here's the record of a test I did recently.
DAMAGED 22 RIMFIRE BULLETS
Here’s a picture of 22 RF bullets with .3 grain filed off.
Cartridges were prepared with .1 and .3 grains filed off with a triangular file.
On 6/27/2007, Model 12/15 BSA Martini, Lyman STS 30X, 50 yards, windy and starting to rain in fits.
Perfect, .1 grain filed, .3 grains filed ammunition.
This gun, like the rest, loves Eley Match ammunition.
I was going to file some Eley Match Red Box, I had the file in one hand and the first cartridge in the other, but a force stronger than I, (and I am enormously strong), kept me from touching that Eley cartridge with the file.
I was able to file the PMC Match Rifle, this ammunition works well in this gun.
Group sizes, leaded edge to leaded edge - .244", all in "
Perfect -.1 gr. -.3 gr.
.433 . 473 .353
.382 .564 .324
.439 1.294 .394
.419 .732 .546
.547 .443 .910
Avg. Avg. Avg.
.444 .699 .505
Here's the target:
As an aside, thirty cartridges had an average weight of 51.9 grains and a standard deviation of .228 grains.
Thirty empty cartridge cases had an average weight of 9.8 grains, and a standard deviation of .07 grains.