1/8 is perfect regardless of temp, elevation, velocity, etc. 1/9.25 is "usually" good if the conditions are right and you're launching a 105 at max speed...you're on the bubble at 105's launched fast....nothing heavier and speed is essential. Extra mag box length is a plus, common mag box length is "hopefully" good.
If you're wanting to send 105(+)'s this is a great standard weight, stainless/synthetic, turnkey platform for it. Short wait, low price, great group buy.
