I have an over-tuned Phantom, I wanted something to experiment with. I welded the bled hole, and polished the cyl on a lathe, among other things. It sends alloy pellets at about 1300 fps. I can hit the broad side of the barn with it as long as I'm in the shadow of that barn.
as previously mentioned, it matters not how fast or hard you send a pellet if you can't reliably hit anything with it. For a .22, 800ish is a good sweet spot. I have a Nitro Venom in .22 that I bought for about $150, and then put about $50 worth of tuning into (most of which was a $35 GRT-III trigger that is worth 10x it's weight in gold) it, and I would be happy to have an accuracy competition with any weihrauch or AA gun that cost many times more. Yes, they are great guns (I own an AA in .177 and it really is a great gun), but you don't need to spend that kind of money to get something you can rely on, especially if you are willing to put a little work into it. If you have to just have something you take out of the box and do nothing with, then you're going to pay.