I managed to try some of these yesterday, it was fairly still out so groups shouldn't have been effected by wind. I started with a clean barrel & shot from the ground off my hand HFT style.
4.52 were pretty good at 25yds, not quite as tight as some 'good batch' JSB, but not terrible. I would need to run them over the chrono & test at distance to make my mind up 100%.
Also ran a few 4.50 through, but it started getting dark so will try these again to be sure about them.
I think if they are as accurate as JSB & the same aim points, then the price is going to put people off when you can buy JSB from Intershoot in bulk for £7 delivered (£9 for single tins)
I will give them another try & post some groups as well as chrono results.
In life you should not persue goals that are easily achieved, develop an instinct for what can be only just achieved through your greatest efforts.