In my Precision Elite I used what I could get here 285,and 300A Tips,it seemed to like the 285's a little more. In the 24" Precision I have only used the 300 A Tips. Velocity between the 30" and the 24" was just like the 2 guys I read there story about Chopping of 1" at a time and recrowning,it was gust a attempt to see velocity difference. My 30 " got 2860 and my 24" gets 2754. I will go with the 24 verses 6 less pounds,and the weight didn't affect the FELT recoil a darn. The problem with experimenting with different loads in my area is lack of Powder,you go to the sporting goods store and one would think that they only catered to the .223 crowd. Hated the cartridge in the mid to late 60's and disliked the rifle even more. I was made for one thing only. Now if it has to be .223 Bullets the build me a 22/250 with a 1in 7 twist and I;d be in heaven. But at the late part of my life I love the boommmers!! The only powder that has been available here was Retumbo at $59.00 a pound and LRT at $30.00 a pound at 70 loads per pound dose not take a math wizard to figure it out. I did try some Mag Pro got very decent groups but it averaged 200 fps slower despite what the manuel read. Pete