7mm Rem Mag Velocity data?

[entoptics]

One way or another, I'm getting a new rifle. Debating 264 Win (have brass and dies) or 7mm RM (have brass and dies). Before the unrelated posts start piling up, I'm not particularly interested in "YOU SHOULD GET A..." I have my criteria, and simply need some more data to make my own informed decision.

Question is, what sort of real world velocities are folks getting for the heavy for caliber 7mm pills? 168, 175, 180 etc. I'll almost certainly be choosing a 24" barrel, so data for that is even better. Published 7mm RM data is pretty spotty once you go above 160 (other than the fatty round nose bullets).

I'm also not all that interested in "bleeding edge" speeds. It's welcome data, but I like to run my rifles a smidge under max if they'll give me good precision. If I wanted 28 Nosler speeds from a 7mm Mag, then I'd buy a 28 nosler...

 

[lancetkenyon]

26" 1:8.5" Bartlein
180 Hybrid over H1000, not max, 2996fps
168 HVLD over H1000, not max, 3065fps
183 SMK over H1000, not max, 2976fps
184 Hybrid over RL26, close to max, 3062fps
160 TMK, over RL23, max load, 3110fps
175 Elite Hunter over H1000, close to max, 3010
175 Elite Hunter over RL23, max load, 3055

 

[dfanonymous]

One way or another, I'm getting a new rifle. Debating 264 Win (have brass and dies) or 7mm RM (have brass and dies). Before the unrelated posts start piling up, I'm not particularly interested in "YOU SHOULD GET A..." I have my criteria, and simply need some more data to make my own informed decision.

Question is, what sort of real world velocities are folks getting for the heavy for caliber 7mm pills? 168, 175, 180 etc. I'll almost certainly be choosing a 24" barrel, so data for that is even better. Published 7mm RM data is pretty spotty once you go above 160 (other than the fatty round nose bullets).

I'm also not all that interested in "bleeding edge" speeds. It's welcome data, but I like to run my rifles a smidge under max if they'll give me good precision. If I wanted 28 Nosler speeds from a 7mm Mag, then I'd buy a 28 nosler...

You'll be getting underspeed data from anyone who gives you velocity based on a 24 inch barrel. Not enough tube for a complete powder burn on the belted mags. Other than that I'd reckon you'd get close to what your reloading manual would suggest otherwise.

 

[Heavyiron]

A reloading book would be your best friend.

 

[Creedmoor shooter]

If you can find it, rl-26 is your huckleberry. I've heard of guys that say it spikes in pressure though when it's really hot out side. I rarely shoot over 85°f where I live so its no issue for me

26in 9.5 browning x-bolt
Rl-26 162 eld-m 3146( ran it harder, but it shot well here and was safe)

Rl-22 162 eld-m approx 3050(not max). Never actually chonoed it. This was a rough estimate based on my drops.

Rl-26 180 eld- 2976 fps. Only load I tried in it and was not near max.

Remington 700 long range 26in barrel 9.25
Rl-25 162 hornady bthp 3096(not max stopped there because the powder wouldnt give me a sd under 17 so I gave up on it with rl-26 on the way)

I acquired a new 7mm, and 8lbs of rl-26 on the way so I'll have more data on the 180s soon I hope.

 

[AZShooter]

Two friends who shoot the 7 Rem mag use Retumbo with the 168 Berger classic hunter. 24" is getting 3100 fps with 73 grs and 26" barrel is getting 3115 with 72.5 grains.

 

[SMK1000plus]

26" 1:8.5" Bartlein
180 Hybrid over H1000, not max, 2996fps
168 HVLD over H1000, not max, 3065fps
183 SMK over H1000, not max, 2976fps
184 Hybrid over RL26, close to max, 3062fps
160 TMK, over RL23, max load, 3110fps
175 Elite Hunter over H1000, close to max, 3010
175 Elite Hunter over RL23, max load, 3055

lancetkenyon is spot on! I'm running @ 24" barrels with 9" to 9.5" twists in my 7mm RMs, 3 factory rifles and the 9" twist is a Bartlein 24-1/2" SS 5R Sendero contour. I get @ 100 to 150 fps less than he is getting, across the board. All my loads are OCW developed loads and none are within a grain of maximum pressure in any of my rifles. I haven't tried the 183gr SMKs, 180gr or 184gr Hybrids though. Not really enough twist in my rifles for use here in the winter, right at sea level. I'll be installing 8" twist barrels on them as I replace their barrels. I haven't used any RL-26. H1000 and RL-23 are awesome. Those two powders produce excellent accuracy and very good velocities in all my 7mm RMs. I have loads for both and can't say that either powder is better than the other.

I don't have a 264 WM so, no real-world data there.

 

[L.Sherm]

Pretty much the same as Lance and smk, Berger 180 VLD 2980fps H1000 not max ES 8 just shoots awesome there.

 

[imartin]

7mm RM Criterion 1:8T 26" on a trued/blueprinted savage action.
Below is data from my load work up.

180 ELD-M, .020" off lands, Norma Brass, Fed 215, Retumbo:
Low: 68.5 gr @ 2,789 fps
High: 71.8 gr @ 3,003 fps

180 ELD-M, .020" off lands, Fed Brass, Fed 215, Retumbo:
71.5 grs @ 3,005 fps avg, .4 MOA, SD = 10, ES = 20

180 ELD-M, .020" off lands, Fed Brass, Fed 215, IMR 8133:
Low: 71.3 gr @ 2,879 fps
71.6 gr @ 2,898 fps
71.9 gr @ 2,886 fps
72.2 gr @ 2,911 fps
72.5 gr @ 2,923 fps
72.8 gr @ 2,930 fps
73.1 gr @ 2,949 fps
High: 73.4 gr @ 2,976 fps

Hopefully that is of some use to you. I never hit the point where I was getting sticky bolt lift, but primers were starting to flatten out a little towards the top end.

 

[twister]

i have 195's at 2850 with retumbo.
162's at 2960 H1000 should have more but i stopped since its a shooter

 

[DUSTY NOGGIN]

well .. at least components are avaiable for the seven

if you go that route . go 28" .. you can always cut it down ..

im curious to see what the other side of the coin looka like

 

[cross]

Barrels vary

1:9 Hart 26" 7RM
168 VLD over H1000 3140
180VLD over H1000 3050

1:8.5 Bartlein 26" 7RM
180 Hybrid over H1000 2850
168 VLD over H1000 2940

Can't explain it. The Bartlein is much slower and highly erratic (ESs of 50 to 60 fps). **** poor accuracy too (1.5 to 2 MOA). I've used RL-26 and gotten up to 2925 or so with the 180 hybrids and VLDs but they're very hot loads and the accuracy is even worse (3 MOA). I'd avoid the Bartleins, I believe the velocities I'm getting are unrealistically low.

 

[B23]

Since you are using a 24in tube I'd go with the larger bore diameter of the 7mm over the 264.

I don't have a 7mm Rem mag but I have a 7mm Blaser Mag which is nearly the exact same size case capacity as the 7mm Rem but the case is a little shorter, fatter, and doesn't have a belt. Personally, I hate belted cases, but to each their own.

The 7mm Rem mag, 7mm Blaser mag, and 7 WSM, at reasonable pressures, all shoot relatively about the same speed. I'm using RL26 w/180gr Berger's and from my Hart #4 finished at 26 inches barrel I get 3088-3100fps. If it had a 24 inch tube I suspect the same load would be right around 3000fps.

As an option, If a person was looking to build a fairly light 7mm/.284 cal hunting rifle with a 24in tube I'd take a good look at the 7 WSM or 7 SAUM and build it on a short action.

 

[JLM8401]

Barrels vary

1:9 Hart 26" 7RM
168 VLD over H1000 3140
180VLD over H1000 3050

1:8.5 Bartlein 26" 7RM
180 Hybrid over H1000 2850
168 VLD over H1000 2940

Can't explain it. The Bartlein is much slower and highly erratic (ESs of 50 to 60 fps). ---- poor accuracy too (1.5 to 2 MOA). I've used RL-26 and gotten up to 2925 or so with the 180 hybrids and VLDs but they're very hot loads and the accuracy is even worse (3 MOA). I'd avoid the Bartleins, I believe the velocities I'm getting are unrealistically low.

The Faster the twist slower fps with given load.
I wouldn't think it would be that much slower though.