300 wm 10 twist - which hammer hunter

[just_jon]

 

[just_jon]

Thought I was posting a video.

 

[HARPERC]

 

[HARPERC]

I can't say what happened, but your post wasn't there when I posted the link. Sorry!

 

[Barehandlineman11]

300 win I'd be using h1000 with the 181

 

[ButterBean]

Do you see this bullet as a single species load, or more of a one rifle North America solution?

I really planned on just using it for Whitetail but after I saw how hard it hit the gong at 500 yards I wouldn't hesitate to use it as the North America Solution Rig

 

[JTH]

Thanks for the video. I found it difficult to be real precise with this, but I'd say I'm right about 1 in 10 for the first 10 inches, and got 2 full revolutions (+/- 1/8") in 20", but that's about all the rifling there is in the 24" barrel, with the chamber and the brake using up the rest of the length. Does that make sense? With this in mind, does 181 still seem like a good choice? I do have a suppressor on the rifle, which seems to help a little in keeping velocity up with the shorter barrel (factory ammo is averaging 2,960 FPS)

Are there any rough guidelines in reloading for how much velocity you might be able to pick up for every 10 grains of bullet weight you go down? What I'm getting at, is what could I reasonably expect for velocity from 152 to 166 to 174 to 181?

 

[twister]

300 win I'd be using h1000 with the 181

i had better luck with 7828ssc in mine

 

[TXTrained]

I'm new to reloading, my first project will be developing a load for a Cooper model 52 with 1 in 10 twist, 24" barrel. After looking at dozens of threads here, sounds like I may have trouble getting heavier bullets to stabilize with this barrel. I'm looking for a recommendation on what grain weight Hammer Hunter bullet would be ideal, and a starting point on powder. I just bought a pound of H4350, but can go to something different if advisable.

This rifle currently shoots factory Fiochi 180 grain swift sciroccos sub moa, but I'm looking to switch to a monolithic bullet. Would it be wise to start with the 181 grain hammer hunter, or should I go lighter due to the copper bullet and 1 in 10 twist? Intended use is for elk and deer, max distance for me is 600 yards.

Good Question.

 

[TBell]

I shoot 300 wm, 1:10, have great luck with 208 grain eldm use H1000 great performance. And yes i hunt with it, 2-21/2" groups, no wind out to 600 yards.

Most 300 i hear about seem to really like the H1000.

 

[nicholasjohn]

Thanks for the video. I found it difficult to be real precise with this, but I'd say I'm right about 1 in 10 for the first 10 inches, and got 2 full revolutions (+/- 1/8") in 20", but that's about all the rifling there is in the 24" barrel, with the chamber and the brake using up the rest of the length. Does that make sense? With this in mind, does 181 still seem like a good choice? I do have a suppressor on the rifle, which seems to help a little in keeping velocity up with the shorter barrel (factory ammo is averaging 2,960 FPS)

Are there any rough guidelines in reloading for how much velocity you might be able to pick up for every 10 grains of bullet weight you go down? What I'm getting at, is what could I reasonably expect for velocity from 152 to 166 to 174 to 181?

Now that you have your twist rate, call the guy at Hammer Bullets and ask him. He will have solid advise for you about which powder(s) guys have had good results with, as well as other tips that will keep you from using a ton of these bullets to find your preferred load.

 

[James DeTorre]

Just to contrarian, Why switch, Siroccos are pretty reliable?

 

[ButterBean]

Just to contrarian, Why switch, Siroccos are pretty reliable?

They are reliable, The Hammers are Certain

 

[HARPERC]

..............Thanks for the video. I found it difficult to be real precise with this, but I'd say I'm right about 1 in 10 for the first 10 inches, and got 2 full revolutions (+/- 1/8") in 20", but that's about all the rifling there is in the 24" barrel, with the chamber and the brake using up the rest of the length. Does that make sense? With this in mind, does 181 still seem like a good choice? I do have a suppressor on the rifle, which seems to help a little in keeping velocity up with the shorter barrel (factory ammo is averaging 2,960 FPS)

...............Are there any rough guidelines in reloading for how much velocity you might be able to pick up for every 10 grains of bullet weight you go down? What I'm getting at, is what could I reasonably expect for velocity from 152 to 166 to 174 to 181?....................

Sounds like you did alright with measuring. The shorter barrel won't hurt you in terms of twist. It's tough to add velocity, and gain stability. JBM has an online stability calculator that's easy to use to help sorting stability issues between bullets.

If what cartridge you're using has been mentioned I missed it.

Butterbean is a high velocity guy, I'm historically a bigger bullet fan, and when changing bullet weights it's usually 25-30 grains at a time. He says use the 152, but he generally uses lighter faster, I like the 174 grains Hammer Hunters in my .30 calibers, which my minimum in .308's used to be 200 grains. Whose right? Split the difference, and use a 166 Hammer Hunter?

Hammer's are slowly changing how I view terminal performance. A lighter bullet that has consistent performance can work very well. The 181's likely will work fine for you, but a little more stability helps keep the bullet square to the target, and in my opinion helps with expansion, and straight line penetration.

Good Luck!