Introducing the Absolute Hammer

[Longrangers]

The BC of .338 is very high.

.338 Cal 300 Gr. HPBT MatchKing - Sierra Bullets

This bullet is designed in the MatchKing® tradition and intended for rifles shooting magnum cartridges, such as the 338 Winchester Magnum and 338-378 Weatherby. The huge 300 grain match bullet is a trendsetter. While they are recognized around the world for record-setting accuracy, MatchKing®...

www.sierrabullets.com

What twist barrel is needed?

 

[C.O. Shooter]

What twist barrel is needed?

Please Note!! The #9300 bullet requires at least a 1×10″ twist barrel.

 

[Longrangers]

Please Note!! The #9300 bullet requires at least a 1×10″ twist barrel.

Ok
I think my son is building one on a 9.25

 

[QuietTexan]

What twist barrel is needed?

My 338LM has a 1-9", I'm not sure I'd build one slower than 1-10", seems very limiting otherwise unless it's a special purpose short range something.

 

[budlight]

I'm a 338LM 1-10" person, but I ask my competition shooting friend and this is what he built after lots of research.

I shoot mainly ELR so I use 300 gr. Berger's / SMK.
I went with a Bartlein barrel with a 1-9:35 twist / 30" on my new SAC build.

 

[Wedgy]

I'm a 338LM 1-10" person, but I ask my competition shooting friend and this is what he built after lots of research.

I shoot mainly ELR so I use 300 gr. Berger's / SMK.
I went with a Bartlein barrel with a 1-9:35 twist / 30" on my new SAC build.

For hunting a faster twist will help the bullet preform better but not needed for target shooting and competition.

 

[CMP70306]

For hunting a faster twist will help the bullet preform better but not needed for target shooting and competition.

So has anyone ever tested this to quantify it at all? Since the hammers can be spun much faster than conventional bullets it would be interesting to see how much of an effect the twist rate plays on terminal performance. Since I doubt anyone is running a slower twist barrel for the light weight Hammers I wonder if that is helping to provide some of the performance gains with the higher velocity impacts.

 

[parshal]

When I spoke with HH they said, anecdotally, that they'd found faster twist had better terminal results on game animals. It'd be tough to test that scientifically on game animals.

 

[nicholasjohn]

I have read that the old-time 6.5's ( like the mannlicher cartridge ) with the long 160-grain round-nose bullets killed well. I don't recall exactly why they said this, but that was the theory they put out there. It was said that rotational velocity somehow contributes to bullet expansion in the animal, and this was said to destroy more tissue and/or transfer more energy, etc. Who knows if there is any truth to that, or how to effectively test for this. I think that the long shank remaining after the front half expands probably keeps them penetrating in a straight line, and this probably counts for a lot. Can't say much beyond that, other than that I would be guessing.

 

[CMP70306]

It would be an interesting test in ballistics gel for someone who has a slow and a fast twist .22-250. Going from 14 to 8 should really show if there is any difference.

 

[ButterBean]

So has anyone ever tested this to quantify it at all? Since the hammers can be spun much faster than conventional bullets it would be interesting to see how much of an effect the twist rate plays on terminal performance. Since I doubt anyone is running a slower twist barrel for the light weight Hammers I wonder if that is helping to provide some of the performance gains with the higher velocity impacts.

That test is underway now

 

[CMP70306]

Thatt test is underway now

Fantastic, I was hoping you would say that.

 

[Nomosendero]

When I spoke with HH they said, anecdotally, that they'd found faster twist had better terminal results on game animals. It'd be tough to test that scientifically on game animals.

It would be good if someone could do a gel test, up close before a slow twist launch could yaw, with a given bullet at the same velocity, firing for example a 6.5 140 gr out of a 1-7.5 vs 1-9 or in .224 a 75 gr in a 1-12 vs 1-8, etc. and if the slow twist is stable enough, further out as well.
Just saw that Butterbean or someone he knows may be doing this, great!

 

[ButterBean]

It would be good if someone could do a gel test, up close before a slow twist launch could yaw, with a given bullet at the same velocity, firing for example a 6.5 140 gr out of a 1-7.5 vs 1-9 or in .224 a 75 gr in a 1-12 vs 1-8, etc. and if the slow twist is stable enough, further out as well.
Just saw that Butterbean or someone he knows may be doing this, great!

It's been done already