Hi, yes, I have had 2 25 souper rifles made, I also have a mate that has ackley improved one as well, if he had his time again, he said he wouldnt do this as it led to pressure problems, and forcing him to go to a slower powder,.. ADI 2213 sc...Accuracey is superb, velocity ample, we roll our own ammo, which is necessary for this calibre, I have kneck sizeed 260 rem cases for a try on some new test loads,..whereas, previously, I knecked up Lapua .243 cases, shooting 100 grain projectiles, using winchester primers, an accurate load with a velocity of 3050 F.P.s was achieved, Sierra projectiles, # 1625.. my powder is ADI 2209,.. but tempted to try Reloader 17 Knock down power is ample on medium sized game out to 350 yards easily,..have seen their effectiveness in the bush and on open clearings,..I preferr it to the .243 because of better bullet weight, and performance,..Hope this helps, and I am open for any questions you may have,