I wish every 22 rimfire shooter would get the LBT lap kit and lap their guns with it. The results are dramatic and the cost is almost nothing if several guns are lapped, as the kit has enough material to lap at least 100 22 rimfire guns. I get masses of reports of accuracy going from 2-3 inches at 50 yards to tight one hole groups. That's with rifles and handguns. I've had guns that grouped 2 inches at 50 yards cut stalks of grass with every shot at that range, and this using the lowest price ammo available. Not all rifles will do that, but most will and ALL rimfires are improved dramatically.
You have missunderstood my lapping instructions in beleiving economy high velocity rounds are what I reccomend for lapping. If the ammo is labeled high velocity, it's velocity is supposed to be supersonic, and will probably produce around 1200 fps or higher in a rifle. IT WILL CAUSE LEADING WHEN CHARGED WITH LAP COMPOUND!
The slowest inexpensive LOW VELOCITY rounds will probably be CCI pistol match. The next slowest that I've tried is CCI standard velocity. CCI also sells a subsonic hollow point, and all 22 short ammo is slow ammo. All good for lapping. The 60 gr subsonic would be excellent for lapping, as the longer bullet will speed the process and do a slightly more precise job of lapping. A big part of the accuracy improvement from lapping is gained by smoothing out the jerkyness in rifling twist rate, and long bullets do this best. Of coarse smoothing the bores roughness and making it one precision diameter for its full length are essential too. But you don't need to spend the extra money on shipping. Buy a couple boxs of the above locally and you'll do the job at the least expense. Most rimfires are lapped perfectly with 20 rounds, a few will be improved with more shots. Ruger stainless can require as many as 100 or more.
