Re: robbor,300yd .22
Absolutely. Rim thickness varies more than you would ever think with regard to bulk rimfire ammo. Match ammo is much more consistent.
There is no sense in having a bolt face machined to exact specs and then feeding it ammo with variable rim thickness.
Match chambers, bolts, and barrels, when coupled with quality ammo, can deliver some astonishing results.
I modify my hunting ammo with an SGB tool. This removes about 1-1.5 grains off the nose depending upon ammo brand and design. When applied to match ammo, the SGB tool delivers a cartridge that has significantly increased whack effect. The nose is converted to a wide meplat.
For long range work I generally use match ammo of standard velocity, sorted and SGB modified. Get the wind behind you, bag it in, and whack prairie poodles at ranges that will embarrass you when you tell others.
I'm currently using a highly modified 10/22 with a Nikon Buckmaster 4.5x14 AO mildot and I'm very pleased with the scope. The mildot makes holdovers a snap when walking the rounds in during a crosswind.
I like the idea of a LR rimfire forum. Quite honestly, LR rimfire shooting is what got me into LR centerfires. And then I found this forum.... and have not looked back [img]images/icons/smile.gif[/img]