I'm very surprised that the Speer Grand Slam has not worked well for some hunters. I have a hunting buddy who has used them in his .270 Win. since they first hit the market perhaps 30 years ago. He has used them successfully and without any negative surprises on approximately 20 elk and 6-8 moose and again as many whitetail deer and a few black bears. I personally have used them as my preferred elk bullet in my .35 Whelens, took something like a dozen elk, one big mountain caribou, and a few moose with the 250 gr. at 2500 FPS muzzle velocity. Perfect performance every time. Bone crushing integrity, deep penetration often with exit hole even on shoulder shots on elk, and decent accuracy. I was only disappointed once, when I shot a deer with one too far back and at fairly long range, a liver shot that required a long tracking job. I think the bullet failed to open on such a light animal. So I learned something here. Just because a bullet works for you doesn't mean it works for everyone, all the time. We normally can't gain enough experience ourselves to be good evaluators of all products in all situations. One good reason I like this forum! I'll still use Speer Grand Slam bullets for medium sized game at average distances in moderate cartridges. I have several boxes on hand in 7mm and .308" that I will use them with reasonable confidence in my 7x57, 7x64 and .308 and 30-06 rifles, but IF I had some on hand in .375 I probably wouldn't use them if Buffalo was the quarry.