Home Forums Reloading Big Game Rifles Help with 7mm rem mag loads

Will do. I should shoot some before and after groups, but I don't expect they'll be that much different.

Probably not, but it will look different and probably handle better too. Maybe....

bsa, safe in my rifle,

67 gns. Rl-22 w/ a 160 NAB, RP hulls and a CCI-250 primer, COL 3.300, vel 3080 in an old 26" barreled SS Sendero, .440 in calm winds.
Good Luck
Gunner

Thanks gunner, I just bought a new nosler reloading manual tonight and some RE25 and the last of the clearance priced nosler 140 gr. partitions. I appreciate the help....Looks like that rifle of yours shoots damn good.

10-Roger BSA, shes a sweetheart, my load may be a scooch over some book max's, but entirely safe in my rifle, can get around 8/9 load outs on the brass to, with one trim in the middle.

Those 140's oughta do You right.

Good luck,
Gunner

Try this site for some loads reported by shooters:

http://www.centerfirecentral.com/viewer.html

I'm loading Ramshot Magnum to a book listed max of 72.6, (I think) with the 160 AB. Velocity is @ 3020 from a 24" Ruger.

That is rather light for 162AMXes and R22 IMO and your MVs reflect it. I personally would move to 64, 65, and 66. I seem to get the best results overall in the neighborhood of 66g R22 with 160 class pills. ~66g under 162 Amaxes lit by 215GMs in prepped WW or RP is a gem in many a 7RM.

Looks like she's got potential.

I load 64.5 grs. of RE-22 with the 160 gr. Accubond, Winchester brass and Federal 215 primers. Velocity from a 26 inch Winchester 70 is 2980 ft/sec.

Boy, these rifles sure do vary a lot.
The model 70 with 26" barrel I am playing with shoots groups as well as .6MOA using 67gn of R22 and I also got greatest velocity with that 160gn Accubond with 3134fps.

Next best load was 73gn of Retumbo for 3057fps and 73gn of H1000 for 3011fps, all using Win cases and Federal 215's.
John

154gr and reloader22 at 66gr mine love it

I tend to load the 4064, RL 15, IMR 4895 burn rates when I carry mine in the field...

but if I had to recommend one powder, Load and Forget it... that would be H 1000....

Tag

The 7mm Rem. Magnum is the one cartridge I would hesitate to ever post loads for. My best load for a 175 gr. bullet is about 4.5 gr. of powder over book max. but is just over 2900 fps. If I followed the book my loads would be anemic. To me this is one cartridge that absolutely requires you to use a chronograph to ensure you are getting what it is capable of.

I am sure there are lots of guns out there that will achieve the velocities predicted by the loading manuals at the listed powder charges but mine certainly isn't one of them. In case anyone is interested the rifle in question is a M70 Winchester Custom Super Grade.

Jim

Jim I have seen the same thing with the M70's in 7RM.

But it isn't unique to the 7 Rem Mag as I have seen it with the M70's chambered 300 Win Mag as well.

Matter of fact it is so common I am no longer surprised when it happens.

Jim,
Good points.
People tend to forget that most of us are apprentice dinosaurs and predate the majority of reloading manuals available today.

Sure, we are technically out of step with modern pressure testing equipment which is never available to the general public apart from isolated cases and so the use of the chronograph is still the bets option.

I have always been a handloader so any factory ammo I test is usually provided so I always include that in my chronographing session to including in the 40+ years of data I have accrued.

This an the book maximum velocities past and present will provide a "feel" for where approximate maximums lay.

Last weekend i was pushing 160gn Accubonds in my 26: barreled Model 70 using a range of powders.

Top end performance came from Rel 22, H 1000 and Retumbo with Rel 22 generating 100fps more than the other 2, with all 3 being on the smiley side of 3000fps.

My concern was that the REL 22 load was too hot though there was no sign of it in the physical characteristics we grew up using.

I went back to miking the cases having factory unfired, once fired, handloaded brass in unfired and one fired during these tests.

The Rel 22 load expanded the cases less than the 2 slower powder that produced less velocity, though again, all were more than 3000fps.

Brass life and primer pockets is still a reliable method of assessment as long as you are using the same batch of brass and controlling the management of cases during your assessments.

Accuracy can be achieved with a properly set up rifle and tweaking handloads and OAL's.

We also learn that by using a range of cartridges within any caliber, the killing effect between them often proves that velocity variance of even a couple of hundred fps (such as comparing a 7x57 with a 7mm Remington) does not have that much difference in the field.

However, and there is always a "however", we mostly, and I am guilty also, of trying to generate the highest velocities in combination with that accuracy requirement. I do not buy a magnum to load it down to a lesser equivalent though that is often mentioned as an option on here. Simply not my way of thinking, as the added trajectory is a comfort even if an unrealistic advantage, it is there.

So I wont give out my 3160fps velocity load for the 160gn Accubond but I will continue to re test it using firstly new cases from that same batch and then reloading over and over until I "learn" if that is too hot, as it shoots into .6MOA and has considerable value in utilization as a stalking rifle.

John

Good to know I'm not alone in experiencing this. None of the other calibres I shoot seem to show the wide variances of the 7mm Mag. I seldom shoot my 7 Mag. anymore, maybe 20 rounds or so a year. Should get rid of it except it is in a very pretty stock and it was my first expensive rifle. I took one moose with it and then it became a closet queen. I find it to be more than I want to use for deer and for moose I now use either a .338 or a .300 WSM.

Jim

n570

You have some? I'll buy it along with an Ivory folder

7RM is an anomaly when looking at book loads, then seeing its potential in real life. A few pards are spinning 180 scenars at nearly 2900 with H4831..Something the books say is impossible.

7RM is an anomaly,7wby is a [bleep] phenom!

73 grains Retumbo, 168 gr Long Range Accubond, just shy of 3000 ft/sec MV, very accurate out of a 24" Tikka.



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