Any Love for the Speer Grand Slam?

MetalMike

MetalMike

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To those who use the Speer Grand Slam in various calibers, what are your thoughts on its performance? I am more interested in the currently available design versus the old dual core design. I don't see as much feedback as I would like about them, so how do they compare to, say, a partition? Anything you could tell me would be appreciated.

The reason I ask is because I just bought a bunch of them for a good price in .257" 120 grain and .308" 150 grain bullets. I plan to use them in my 30-06 Sprg and my 25-06 Rem.
 
They are good bullets and IMHO have always done everything exactly as claimed by the manufacturer. That includes the older style as well as recent manufacture.

One thing about them though. Some rifles won't shoot them well and they seem to prefer tighter twists to stabilize them for best accuracy.

For instance, I have a 30-06 with a 1-10 twist rate and it shoots them very well. I also have a 30-06 with a 1-12 twist rate that won't properly stabilize the same 180 grain Speer GS or Mag Tips. It shoots everything that is 165 grain and lighter well. It could just be a quirk of the barrels or just the way I hold my mouth. I think it's the slow twist. By the way, both chambers were cut with the same reamer.
 
Well the discontinued Speer African Grand Slam tungsten bullet was highly spoken of ... but too pricy when available. Despite purchasing various grand slam bullets over the years I have never shot anything with one (other than paper)
 
I had a couple of them disintegrate in moose at 308 Norma Magnum Velocities. [1 - 165, 1 - 180]

In both cases, the moose were quickly killed, but could only find the base of each bullet, none of the rest was found.

So quit using them for anything above 30-06 persuasion.

They seem to be ok at the slower speeds.

My go-to bullet remains the venerable Partition.

Dave.
 
Used a 200 grain in the .300 win mag for years with tremendous accuracy and performance. I liked the older dual core ones the best as they were tough bullets.
 
I had a 150 grain Grand Slam in my 270 completely lose it's jacket in a goat. The goat died, but only because the jacket cut the main artery by the heart.
 
As mentioned, it's a usable bullet for sub 3000 fps velocity. Not a premium.

I prefer the Speer Pro Hunter, which is a flat based bullet and not so prone to shedding jackets as the boat tailed Grand Slam is. The techie at Speer hot line told me the Pro Hunter was a tougher bullet.
 
jethunter said:
As mentioned, it's a usable bullet for sub 3000 fps velocity. Not a premium.

I prefer the Speer Pro Hunter, which is a flat based bullet and not so prone to shedding jackets as the boat tailed Grand Slam is. The techie at Speer hot line told me the Pro Hunter was a tougher bullet.
Click to expand...

With all due respect jethunter, I think the Pro Hunter is a Sierra bullet, not Speer
 
Does anyone know when they switched from the dual core? Or better yet if there was a chance in packaging at the same time?

I have some grand slams, and would really like to know if they are the old dual cores or not.
 
jethunter said:
As mentioned, it's a usable bullet for sub 3000 fps velocity. Not a premium.

I prefer the Speer Pro Hunter, which is a flat based bullet and not so prone to shedding jackets as the boat tailed Grand Slam is. The techie at Speer hot line told me the Pro Hunter was a tougher bullet.
Click to expand...

Not only is the Pro Hunter a Sierra bullet, but the Speer Grand Slam is a flat-based design.

Are you thinking of the Sierra GameKing, which is a boat-tailed bullet? I can't imagine a world where tech support for one manufacturer touted the qualities of a competitor's product...
 
I've taken several whitetails years ago using 7m/m and .30cal's. Did the job, but not sure if a standard cup&core bullet wouldn't have done any better. If your rifle likes them then go ahead.
 
Thanks for the replies, sounds like they should be a good balance between expansion and penetration and that's what I'm looking for, but I suppose the only way to truly know is to use them. Although they are normally somewhat pricey, they aren't bad for a premium bullet. If there are any more experience, please share.
 
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