Have 1 Krieger,2 Criterian,1 Excaliber,& had 2 Savages, 4 were LT Varmint, 2 or HV Varmint All 26 " the Savages were 1 in 12 " Twist ,all others 1 in 11" twist, Shot out the Savages & 1 Criterion,got over 3200 on Krieger Still shooting, got approx 5,000 out of the savages, 4000 + out of the Criterion , when the groups open up over 1/2 MOA it's time to replace them. Tried 32 gr Hornady Nosler, Sierra,. 35 Bergers, 39 Blitz king, 40 Bergers,40 Noslers & 40 V-Max out of these barrels, anything a 32 grain will do the 40's will do better past 250 yards the 40 V-Max always shot the Best out of each barrel , The 35,30 grain bergers were close; but at $10-15 a box more than the V.Max. My Go to Powders are Varget, Win-748, IMR 8208 XBR, H-4895. Got the most velocity out of H-4895. H 322 &H-335 also shot good with the 35 & 40 grain Berger & 39 Blitz King, have also tried BLC-2,Benchmark,TAC, CFE 223. None of the Ballistic Tables are even close at 800 to 1000 yards with the 204 Ruger & 40 grain bullets. ,I'm shooting at 1260 ' Altitude; the drop at 1000 yards is amazing,almost 40 MOA but the 40 V-Max hang together. Had Never shot at distance until a friend Bet Me it couldn't, Should have seen the face of another shooter with a 338 lapua,when he got Waxed by a .204 & 40 grain bullets @ 1000 yds ,Priceless !