Biscuits wrote:^ Always interested to hear what long range 22 rimfire shooters are doing, bladeracer. Is you adjustable scope base an Era Tac?
I considered that, but it ties me to a particular scope tube diameter. In my case, my 22 has a 30mm tube scope, whereas all my others are 34mm tubes. I'm reluctant to cough up for an expensive base which ties me to a (relative to the other scopes) a lower cost scope. Hence my thought on getting a Coldshot or WR precision base, which goes on the picatinny rail and under the existing rings. It will mean that my cheek rest is too low, but I can put something temporary to fix that. Hopefully if I only put this on when I am doing ELR, the zero won't change much when I take the scope on and off. I've only used R100 for ELR rimfire. I must try CCI Velocitor and see if what you lose on it being non-match ammo, you gain on higher velocity.
The first mount I bought was something like $140 from the UK, but I soon found the same mount unbranded for $40 direct from China. I don't recall the brand off-hand, though I will have posted about it here several times. It is a one-piece ring mount that sits atop a base. It uses a pair of pivot pins on the sides at the front to zero your windage, and elevation is adjusted by two screws at the rear, one raises the rear of the mount, the other locks it down against the first. (Set up the windage first before locking down the elevation or you will have to back off the elevation screw every time you adjust the windage screws). It's never moved and holds zero when I swap on a shorter-range scope. It would be very easy to make or have somebody make for you.
The easiest way to make these is to buy bulk pic rails, I think I was paying about $60 for ten rails in the shorter lengths, the 300mm are more expensive. Put one in a mill and mill it off flat and level. Put others in the mill upside down and mill those off to whatever angle you need, then bolt them to the first one. If you're going extreme you'll need a raiser between the two, which can be 6061 bar stock to suit.
If you have already calculated the required angle (based on your zero distance and available scope adjustment, you can set the mount very close with calipers. But windage requires shooting to zero. I think I pulled mine off nearly a dozen times for adjustment when I set it up, but have never adjusted it since.
There are ludicrously expensive mounts that are click adjustable on the fly, but unnecessary for a .22LR out to 500m. A decent scope has enough adjustment to shoot .22LR out to 500m, which is about as far as is practical, I think, due to the .22LR bullet's horrendous ballistic coefficient.
1000m is achievable with some .22LR ammo, but not with any degree of repeatability, in my opinion. Okay for informal plinking at at something like an old bus perhaps
I haven't seriously played with HV past about 240m, mainly because the only one I've tested that comes close to consistent sub-minute at 100m is discontinued.
The BC of heeled bullets is so low that launching them much higher than the sound barrier just means they dump their extra velocity ridiculously quickly.
One thing you'll love about coming home is no ammo limits, you can buy bricks and even cases of whatever ammo you can find for testing.
