Which 7mm Hammer?

[Rich Coyle]

Lord willing I will build a big 7-.338RUM. The barrel is 26". Which Hammer Bullet for hunting out to 700 yards?

 

[Varmint Hunter]

That could be highly dependent on barrel twist. Check the Hammer site for recommended twist rates.

Is there much difference between a 7-338RUM and a 7 RUM?

 

[Rich Coyle]

The barrel will be an 8" twist.

For comparison I measured three cases: 7 RUM, 7-.338 RUM, and a 7 STW. 7RUM holds 113 grains of water. 7-.338 RUM holds 108.5. 7 STW holds 100.2.

I hope that is the kind of info you are looking for.

 

[Wyosam]

I'd use the either the 177 or 155 Hammer Hunter. The absolutes don't seem to gain as much in those really big cases.

 

[JJMoody]

Out to 700 I wouldn't shy away from going light. My 28 nosler flat out likes the 142HH loafing along at a mild 3500 FPS/H1000 MPBR over 400yds. They get a little squirrelly past 800, but up to there, they shoot very consistent.

 

[lancetkenyon]

I shoot the177 HH in my 28 Nos @ 3278. .3MOA @ 500. Shot them out to 921 at just under .5MOA.

 

[Nevrsummr]

Also shooting the 177 out of 28 nos. (3150)But not nearly as fast as lancetkenyon. They perform great. I am considering trying the lighter ones though as steve recommends them. Also going to try n570 this year. Im guessing thats what lance is using.

Keep us posted on your build. Sounds like a screamer!

 

[Rich Coyle]

So far I have a reamer and a brake and some brass. I have a meet this morning with the realtor who has a buyer for my three acres. Lord willing I will be ordering the rest of the parts very soon.

What bullet did Steve suggest?

 

[Nevrsummr]

The 143? i think. Or 142 that jjmoody mentioned. I imagine you might be pushing that around 3800 with your build.

 

[RockyMtnMT]

Rich,

Depending on the range You want to work to or what weight feels best. With the 8" twist you can run any of them. I personally like the screaming 143g Hammer Hunter. In your cartridge it will be tough to beat out to about 900y.

 

[Rich Coyle]

Steve,

The farthest I saw game in a hunting situation was 700 yards. What do you think the velocity would be at that range?

 

[JJMoody]

*correction* 143 HH. Thought I weighed them at 142...

 

[Rich Coyle]

*correction* 143 HH. Thought I weighed them at 142...

Maybe it's called a 143 but really weights 142.

 

[GLTaylor]

For what it's worth, we have several times shown that Absolutes show no appreciable gain over regular Hammers once you approach - and certainly when you exceed 100 grs powder capacity.
In my 7 RUM I get almost 3700 with 131 Hammer Hunters. Haven't shot the 143s. 131s shoot too well and Kill. My load is 103 ish grains of 570.