7mm cartridge choice for long monolithics

[JakeWes]

Shameless 7mm STW plug, definitely will not fit in a tikka action, but I shoot the 172gr Absolute Hammers at 3250.

 

[MTMagpie]

7 max is ready to load, fully formed

That might settle it for me then.

If I was you and running a heavy Hammer, I'd really look at the 170 gr HHT. The velocity looks acheivable. The 177 gr requires a 7.5 twist.

.284 Cal-170gr Hammer HHT™ - Hammer Bullets

AT THIS TIME TIPS ARE CONSUMER INSTALLED TIPPING BLOCK INCLUDED WITH EACH ORDER Designed for a minimum twist rate of 1-8", this pure copper lead free Hammer HHT™ will be a great choice for long range hunting with the big 8" twist rifles.

hammerbullets.com

.284 Cal-177gr Hammer Hunter - Hammer Bullets

THIS BULLET IS NOT RECOMMENDED FOR HUNTING BELOW 2500' ELEVATION DUE TO IT'S VERY LONG LENGTH CAUSING DYNAMIC STABILITY ISSUES Minimum required twist rate is 1-7.5" or faster Bullet length is 1.665" Bullet weight is 176 grains Recommended use: Big game hunting G7-BC=.313 estimated

hammerbullets.com

Thanks for catching that, you're probably right about the 170gr HHT being a better fit here. I did read that the expansion threshold for those HHT's is around 1700fps, which is exciting.

 

[Northkill]

That might settle it for me then.



Thanks for catching that, you're probably right about the 170gr HHT being a better fit here. I did read that the expansion threshold for those HHT's is around 1700fps, which is exciting.

Yeah, that 170 HHT looks pretty potent.

 

[RockyMtnMT]

I think the Sherman is a great idea. I just built a 7 PRC on a Tikka action with a 26" Proof carbon fiber and will be running the 170gr HHT this year. I am running them at 3130 fps with rl26. I am guessing the Sherman will be a bit more potent.

 

[Northkill]

I think the Sherman is a great idea. I just built a 7 PRC on a Tikka action with a 26" Proof carbon fiber and will be running the 170gr HHT this year. I am running them at 3130 fps with rl26. I am guessing the Sherman will be a bit more potent.

That's a killer combo you got right there. What's you COAL? You wouldn't have a photo of a loaded case to show us, would you?

 

[HuntnPack]

I'm leaning toward the 7 SAUM, 7 SS, or 7 MAX at this point just from the standpoint of being able to fit it into a Tikka action. Didn't realize 7 SAUM brass was readily available, though I honestly didn't look to hard.

I'll probably run a 22" barrel to run it with a can in the future. That probably pushes me toward the 7 MAX to make up for the lost velocity in barrel length. Can 7 MAX brass be found fully formed or does it still require some fire forming? Fire forming's not a deal breaker, but it's really nice not to have to do it!

I'd recommend you stick with the 7SAUM.

 

[MTMagpie]

I'd recommend you stick with the 7SAUM.

Any reason in particular? Just because it's SAAMI aproved?

 

[MTMagpie]

I think the Sherman is a great idea. I just built a 7 PRC on a Tikka action with a 26" Proof carbon fiber and will be running the 170gr HHT this year. I am running them at 3130 fps with rl26. I am guessing the Sherman will be a bit more potent.

That was my original path for this build, but i'd seen too many posts about people running into COAL limitations in the Tikka action/mag. That and brass is still hard to come by.

 

[HuntnPack]

Any reason in particular? Just because it's SAAMI aproved?

Short answer…… Yup.

 

[dmj]

I have a 7max built on a tika action. I didn't do the load development for it and has a 20 inch barrel. It has two bullets that have loads developed for it. The 180 berger vld and the 175 eldx. Both are just short of 3000 fps using h1000. Very nice shooting rifle.

 

[RockyMtnMT]

That's a killer combo you got right there. What's you COAL? You wouldn't have a photo of a loaded case to show us, would you?

Here is a pic that I took at the bench when doing load development.

 

[RockyMtnMT]

Pic of the final round. 3.250" coal

 

[john k]

Good luck to whoever is going to try an intervention on our community! Lol

 

[RockyMtnMT]

Good luck to whoever is going to try an intervention on our community! Lol

Ok I'll bite. What does that mean?