Unless a powder is truly difficult to ignite, the .308’s modest powder volume does not require a magnum primer to achieve correct ignition. You get with target shooters and they all have their favorite powders, and even though the 308 is no longer dominate on the firing line, most M1a shooters like IMR 4895 or IMR 4064. 308 Winchester m Universal Barrel length& ... 86 IMR Powders IMR 3031 39.3 40.9 42.5 95 IMR Powders IMR 8208 XBR 39.3 41.2 43.0 43.9 98 Winchester PowdersWin 748 42.0 43.3 44.6 45.3 45.9 100 Accurate Powders XMR 2495 40.7 42.2 43.8 44.5 45.3 101 Ramshot Western TAC 40.6 42.2 43.8 44.6 45.4 102 Hodgdon H335 40.1 41.7 43.2 44.0 44.8 cartridge to the sporting public as the 308 Winchester. According to My Lyman Manual (Latest Edition) 42gr of IMR-3031 will Produce 2652fps w/ a 165gr Bullet. My experience indicated I should stay within the range of IMR 3031 (fastest) and CFE 223 (slowest) when loading for my 308 Sun Devil rifle. Imr.3031,or Imr.4895 I have had exelent results with IMR 3031 ,and also IMR 4895 those are 2 of the three powders I use the most,my powder mesure does'nt meter them well so I throw lite charges and trickle the rest on my scale.IMR 4064 is what i use in my 358 Winchester,but all my rifles except 1 have 24-26" barrels. However, most powder charges were between 40.0 and 50.0 grains. Using bullets from Barnes TSX FB, Sierra SP, SinterFire, Speer HP, Nosler BT, Nosler E-Tip, Sierra HPBT, Hornady SP, Barnes TTSX BT, Speer SP, Hornady BTSP, Swift SP, Hornady A-Max. The rule of thumb is not to use anything faster than IMR 3031 or slower than IMR 4064. Let’s start with the most important factor: selecting propellants. Snakepit, I cannot speak for IMR 3031, but if your friend can get hold of either IMR 4895 or even RE15, they've proven to be the best replacement for Varget in my .308, 25.5 " barrel, running the 168 HPBT's being pushed by 42 gr and bullets being seat at .017 off the lands in a Hart 1:10 MG barrel and thats @ 100 yds. In my Limited Experience This Seems to Prove Particularly True in the .308. Powders include IMR The Latest In Reloading, Straight To Your Inbox Keep up-to-date on new products, trends and tips from the leader in reloading. Neither did I experience any poor ignition with any of the accompanying load data, which was developed using Winchester Large Rifle primers. Now, To My Point. 1/2 MOA in an upgraded M1A Well below Max Load, but Use at your own risk - or start out with a little less powder and work up. Also, I won’t push for maximum velocities—especially with the “slower” burn rate propellants. 308 Winchester Powder Minimum Maximum Charge (grains) Velocity (fps) Charge (grains) Velocity (fps) IMR 3031 38.9 2621 43.2C 2873 A-2230 40.0 2700 44.4 2924 Win 748 43.7 2732 48.6C 2972 BL-C(2) 44.9 2723 49.9C 2994 A-2460 41.6 2739 46.2 2978 .308 Winchester (Hodgdon Data Using IMR Powder) reloading data with 170 loads. I have Also Noticed that Most Load Data Points to the Highest Accuracy from Powders that have the Higher Load Densities. I used about two pounds of estate sale IMR 3031, found that it shot very well. Other propellants, such as IMR 3031 and 4895, TAC, and W748, have provided good accuracy with target bullets in other .308 rifles. The consensus is to … Re: .308, 168 gr match load recipe LC cases, CCI BR2 Primers, 41.250gr IMR 4895, 168gn SMK. Initially, the 308 was chambered in the bolt action Model 70 rifle. Since then, the cartridge has ... IMR-3031 40.5 41.9 43.3 44.6 46.0 ... RELOADING MANUAL• 5TH EDITION 308 Winchester continued Powder /Velocity 2700 2800 2900 3000 3100