Home Forums Reloading Big Game Rifles Sierra Grand Slam Opinions

I use both the 145 and 160 grain Speer Grand Slam in my 1885 Browning Single shot in 7Mag. The 130 Grand slam in my .270 is very accurate, but the 7 Mag is where the GS really is accurate. The 145 loaded with max charge of IMR 4350 shoots .5 MOA all day long. The 160 is almost as good. I used the 160 and that single shot to take a west Texas mule deer at 603 yards. He dropped like he had been pole axed. I haven't noticed any difference between the old version and the new version when performing on game. Axis deer and whitetails still get killed.

I've been loading the new 145's primarily for my 7 Mag, but I still have a yellow box of the old 160's sitting on my loading bench. I may use them again one day.

I've had good luck with 100gr. 6mm GS's. Accurate and they've held together for complete penetration on whitetails and antelope. My son started out with them thru his 6mm 788 and still in his .243 Sako. My niece used the same 788/ bullet on two cow elk back in her starting out years. One shot each.

Have a pile of current production GS bullets:

.277/150 gr. (270 Win)
.264/140 gr. (6.5x55mm)

$0.22/pop w/ the Speer rebate.

Couldn't be happier.

Just don't over-stress'em, and they perform beautifully.




GR