Thread: An accuracy challenge

I've been intrigued by this thread since it first appeared 3 years ago.
So far, after 7000 views and 125 replies, 5 people have posted 5x5shot groups:
Gimp
Norway
Claw
Leathel (twice)
Kiwishooter (but on 5 different targets)

No doubt it's tedious to truly compare accuracy because you do have to shoot 5x5 with each variation of ammo / technique etc. Who would do it just to escape Gimp's wet fish ?

Yesterday, I had a few things to check and wanted to set myself a new benchmark now the gun has shot about 1500 rounds and I'm getting to know it.

This was at 100m and the grid is 1cm. All metric here. I calculated a MOA is 29mm at 100m (well got it from Wikipedia actually). You'll have to take my word for it they were all shot back to back with no omissions. I didn't have a big enough sheet of paper to fit 5 targets on.

Target 1


Target 2


Target 3


Target 4


Now I have to confess I only had enough rounds left to fire a 3 shot group to finish. ..

Target 5
200m


So, of course this isn't sub 0.1 mRad shooting. Ha Ha. Most of the 5 shot groups contained several sets of 3 that would go under MOA and several under 0.5 so 3 shots is not impressive.

Measurements


This is shooting with my hunting rifle, a Sako 85 with S&B PMII 3-12 and A-Tec CTM4 suppressor in 7mm08 with Norma brass, Fed 210, AR2208 and Nosler BT 140gr. The factory ammo is also Norma with 140gr BT.

In the end, I've checked that point of impact and grouping is similar using a sandbag at the bench or prone and with a bipod and with the sling looped over the barrel instead of a swivel on the stock. It also holds zero within the limits of my shooting and is stable over 50 shots without cleaning and with new brass or cases loaded 14 times. Factory ammo has not shot quite as well as my handloads on several comparison tests. With my standard hand load its close to "MOA" which doesn't sound that exciting but is good enough for the hunting and a bit of field target shooting.