I'm working on a high performance mag-length heavy bullet 308 load with RL17 powder.

I like the 208 AMax but to fit it in the Rem magazine (2.825" on mine) requires pushing it way down until the ogive is almost entering the neck. Takes up a fair amount of case volume.

So I went looking for something else with a fairly high BC, and a little shorter length. Three bullets look interesting.

200 gr Speer SP, 1.27" long, BC .546

200 gr SGK, 1.40" long, BC .550

200 gr Accubond, 1.485" long, BC .588

For comparison, the 208 AMax is 1.53" long, BC .648


I have some of the SGKs, and ABs on hand so I'm starting off with them.

I laddered up with the 200 SGK with some pretty good velocity numbers. Only fired two rounds at each level for velocity figures. Will get them on a target soon.

Here's the data,



M700 VS 308Win
Factory bbl/throat, cut to 20.5"

200 gr Sierra Gameking
Win brass
CCI 200
2.81" oal
Reloder 17

50.0 gr - 2610, 2621 (15' from muzzle)
51.0 gr - 2662, 2663
52.0 gr - 2721, 2714 (fairly heavy compression, just a hint of bolt resistance after firing, no ejector imprint or primer flattening).

I loaded up 10 rounds at 51.5gr for an accuracy check. Estimating about 2700 fps MV. This will deliver approx 1900 fps/1600 ft-lbs at 600 yards, in local atmo.



There will be updates to this as I go along.