Speer Grand Slam
- Thread starter Keyfer 55
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Patocazador
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AFAIK, they are good-performing bonded bullets. I have several boxes but never used them on game.
troy fairweather
Member
There a good bullet, I am thinking of going back to them next year, and the speed hotcors and spitzers.
troy fairweather
Member
speer gs 4th from the left.
Robbins290
Member
I am clueless, but why is that bullet shaded 2 colors? I thought that had to be uniform to be accurate.
troy fairweather
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I think some of them may use a partion and maybe the lead is different,
Robbins290
Member
That would make sense.
DM~
Member
When did they start "bonding" them??
They never use to be, and because of that, weren't all that good of a "premium" bullet, at least NOT by NP standards!!
DM
Patocazador
Member
I don't know if they are actually bonded but I have seen them referred to as "bonded". Here is text from Midway.
Speer Grand Slam Bullets 30 Cal (308 Diameter) 150 Grain ...
https://www.midwayusa.com › Reloading Supplies › Bullets
Rating: 4.8 - 15 reviews - $14.99 - In stock
Speer Gold Dot Rifle Bullets 30 Caliber (308 Diameter) 150 Grain Bonded Soft Point Box of 50.
Softer lead in the tip, hard lead in the base for controlled expansion. I like them in my 6mm Rem
Captcurt
Member
Speer used a special bonding process to bond the core to jacket and used a higher antimony lead in the base. I shot one of my best bucks with a 130gr 270 at the awesome range of 25 yards. Shooting down from a tree I hit the buck under the white patch on his throat. The bullet took out 6" of veritbrae, went into the chest and made mush of the lungs and arteries at the top of the heart and stopped under the skin at the end of the sternum. I still have the bullet. It kept over 60% of it's weight. If a bullet was going to break up, it should have done then.
DM~
Member
LOT'S of folks think, "Hot Core" means they are bonded, it doesn't...
It's just another way to measure out core size. Some think it eliminates air pockets in the jacket, it does reduce the chances of it, but these days you don't find an air pocket in ANY brand of bullet, they are just swaged under too much pressure to have any.
I haven't found GranSlams to be much better than a hot core of the same weight/design... You can't hit really tough bone with them and not expect them to come apart... (read, core separation)
A "REAL" bonded" core bullet, will NOT loose it's core!
IMHO, GS's are over hyped and over priced...
UNLESS, they have now changed the process and are now bonding them.
DM
BTW, "Deep Curl" bullets are the bonded Speer bullets.
It's just another way to measure out core size. Some think it eliminates air pockets in the jacket, it does reduce the chances of it, but these days you don't find an air pocket in ANY brand of bullet, they are just swaged under too much pressure to have any.
I haven't found GranSlams to be much better than a hot core of the same weight/design... You can't hit really tough bone with them and not expect them to come apart... (read, core separation)
A "REAL" bonded" core bullet, will NOT loose it's core!
IMHO, GS's are over hyped and over priced...
UNLESS, they have now changed the process and are now bonding them.
DM
BTW, "Deep Curl" bullets are the bonded Speer bullets.
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2ndtimer
Member
Back in the old days, the Grand Slams had a harder lead in the base of the core and a softer lead toward the nose to encourage improved expansion. They also had a system similar to Hornady's interlock to help keep the harder core in the jacket to ensure deep penetration. My understanding is that they did away with the dual lead cores and interlock system years ago and that the current Grand Slams are just Hot Cores with a flatter tip, slightly thicker jacket, and a slightly harder lead core. Definitely not enough different to command a premium price, in my opinion, at least. But still a decent cup and core bullet, if your rifle likes them.
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