Depending on barrel length, the dtac in the gt isn't always optimal. I run a 6gt in prs with standard 115 dtacs. From a 26" barrel the accuracy nodes at 2810-2820 and then again near 2900. The long bearing of the 115 at 2900 is up there in psi, nothing noticeable in good conditions, but in rain and dirty conditions, I have experienced random bolt lift on some rounds. So the all weather safe load is below 2860fps. Shorten that barrel up and the velocity starts to fall off even more. I have a 24" 6gt and can reliably and weather safe run 108-112gr bullets at the 2900-2920 range. I shoot 6cm, 6gt, 6bra. The only ones I don't have is a dasher, and br which bracket the BRA by about 50fps each. I do particularly like my 24" 6gt, it's a heavy lil thing with m24 steel barrel, in a Hnt26 chassis with scope is 12#, with supressor and bipod closer to 14# but is a total joy to shoot and very accurate. I had a 22" Bartlein carbon spun for hunting, but that tube has issues and sent it back to them.