Shot it today, with my two mates Anschutz and FTP 900, It's definitely nicer to shoot than my previous power plant, a bit softer and slightly less sight picture movement, can shoot it sat on my knee, ie no need to put my hand under the stock , in fact I just sit it there and hold my knee with my left hand to brace my position. Mind I could do that with the 21 mm as well ,so it's a subtle improvement, the law of diminishing returns and all that .
I suppose the best way to sum it up, is that I only built the action a few days ago so it probably had maybe 60 shots through it, and I came first today scoring a 31/ 40, three point ahead of the FTP.