Going through a complicated testing procedure isn't going to do much for your box stock .22 rimfire rifle. While I've yet to find a .22 rifle that doesn't have some kind of preference when it comes to ammo, the difference can be little to very little! It all depends on several factors, such as, what is the accuracy potential of the rifle, how well can the shooter shoot and always, exactly what does the owner expect from the rifle? Do you want to shoot bugholes at 25 yards? 50 yards? Are you even able to shoot bugholes?
There are quite a few rifles that have a reputation for very good accuracy and of course there's always the custom route that can be taken (trust me, it's a rabbit hole!). If you're looking for the utmost in accuracy then the testing procedure I listed in post #75 is a must. You'll spend time and money testing then will have to buy a bunch of whatever ammo "wins" the test because when they clean the machine or have to replace parts, it may not be the same ammo it was before! Or maybe the guy didn't hold his tongue right when he switched the machine on! Who knows? But chasing that last few thousandth of an inch can be downright consuming when it comes to your time and money, since the best shooting ammo is never going to be what's cheap and easy to get!
Yes, it can be very rewarding when you get your rifle to shoot *consistent* 1/4" groups (one quarter inch group does not make your rifle a 1/4" shooter!). And just about any rifle that will shoot one brand that well will usually (very important word there, usually) shoot any other decent ammo pretty well, too. Eley, Lapua, CCI target, Wolf target, none of these are cheap by any means but it's the price you pay willingly once you've fallen down that rabbit hole!
Besides which, stuff like this is what keeps me off the streets! Fact is, I'm about ready to dive down another rabbit hole today as I'm going to pick up my Ruger Precision in .22 Mag! I do love doing stuff like this!
Cheers,
crkckr