Match ammo for Sig 550 Sniper 26 and Sig 550 Sniper 18

Hello All,

Hope you are well and healthy. I have 2 Sig 550 Sniper rifles that I am working up. One has the standard 26 inch 1 in 10 twist barrel. The other is a super rare 18 inch bull barrel sniper - also with a 1 in 10 twist barrel. My other 550 series guns are all 1 in 7 and they love the IMI Razor 77 grain. I ran some really quickly through the 550 Sniper (26) and it did ok (1.5 -2 MOA) but I'm thinking I can get that down.

Questions:
1) What kind of lighter weight bullets are folks getting good accuracy with?
2) Any thoughts on the impact of barrel length?
3) What bullet weight should I be looking at?

At any rate, any suggestions would be cool.

Thanks,

D

69 gr Outback if you can find it. 69 gr FGMM too

For much lighter laser beams Hornady Amax or Vmax in 50-55 gr usually stack holes.