7mm Remington mag for long distance shooting?

[spudgun]

Well I gave up on my 308, AR10. I bet I tried 20 different reloads to try to get it dialed in. No luck past 200 yds.

Was going to rebarel in 6.5 Creedmore, but then I remembered I have a Remington 700, in 7mm mag that I have not shot in about 20 yrs.

Well, put the Vortex PST II on it and took off to the range. Had some reloads from the 90's and figured we will see how it does.

Shooting 150, 160, 175 gr reloads and it appears that the 150 are the best groups at 200 yds.

Anyone on here shooting 7mm for long distance?

If so would like to pick you brains on different powders and bullet weight.

I am presently using H4350 and IMR 4831.

 

[#40Fan]

Not long distance, but I love me some Reloder22 in my 7 Mags.

 

[rmr]

I think its an excellent choice. Especially since you already have it.

4831 is fine. These days I would try RL22 or 25, along with a 168 or 180g bullet (assuming you can stabilize them)

if building a new rifle, I would probably gravitate to a 284W, or a 7RSAUM.. depending on the intended application. (no belt to deal with) but the 7RemMag is *very* capable at 1k.

 

[STOMP442]

7mm Mag is a very capable rig for 1000 yards and beyond. H1000 and Retumbo have given me excellent results with 180gr Berger Hybrids at very near 3000fps. 70-71 of Retumbo has been my go to load here as of late and giving me 2960-2980 fps depending on the barrel and single digit ES.

 

[spudgun]

Thanks for the encourgements.

So I assuming that a 168 to 180 bullet would be the best grain weight?

I guess I was concerned about bullet drop with the heavy bullets.

My Rem has a 1:9.5 twist, 22" barrel.

 

[#40Fan]

Once you venture over the 168 grain weight, a faster twist barrel is in order.

 

[CaptainMal]

I use Rel 22 in both of my 7mm mags. Brother-in-law does also. Mostly used for deer with kills up to 710 yards for me, I use the 154 SST.

Our loads are in the mid-60's of powder with two taking the same weight and one liking just a grain less. We get about the same velocities on my chronograph as those factory Hornady Superperformance loads using the same 154 SST.

 

[spudgun]

Once you venture over the 168 grain weight, a faster twist barrel is in order.

That was my thinking too.

I know my 308 1:10 does like 168 and 180's

Thanks

 

[Bart B.]

After a friend used a borrowed 7 Rem Mag to win the big 1000 yard match at the 1970 Nationals setting a new record, it became popular for such events. He used IMR4831 and168 grain bullets.

 

[#40Fan]

It sucks that most bullet manufacturers don't tell you what twist is need to stabilize their bullets. Sierrabullets.com will tell you what is needed.

 

[Clearsight]

I'm going this route right now, I bought 1500 175 hpbt. And 500 pieces of brass about 10 years ago and never had the time to work on it. I have a custom reamer and Bartlein barrel, gain twist and LH twist being built right now. Hopefully by Christmas I will be sending some down range. QL says I should get around 3000fps using 33, n217 or n570 out of 28" barrel. The Belt Lives!

 

[Davidb187]

It sucks that most bullet manufacturers don't tell you what twist is need to stabilize their bullets. Sierrabullets.com will tell you what is needed.

Berger too. Right on the box.

 

[Bart B.]

I'm going this route right now, I bought 1500 175 hpbt. And 500 pieces of brass about 10 years ago and never had the time to work on it. I have a custom reamer and Bartlein barrel, gain twist and LH twist being built right now. Hopefully by Christmas I will be sending some down range. QL says I should get around 3000fps using 33, n217 or n570 out of 28" barrel. The Belt Lives!

Why a left hand gain twist?

 

[ireload2]

A Navy petty officer won rhe 1000 Wimbledon Cup about 1970 using the 7mm Rem Mag. The load recipe is listed in the first edition of the Sierra loading manual.

 

[vegas]

Retumbo and H1000 have worked for me. I have loaded a lot more H1000 and have settled on 68gr with a 162gr ELD-M for around 3100fps on a 26” barrel. Also load 66gr for a slightly less hot load with good results.

 

[Duhawk]

Burned the barrel out in mine. Tossed the 24" sporter barrel and opted for a 26" Douglas 8 twist. 1st time out used the same recipe, 70grns Retumbo and Berger 168s. Shot a 5 shot group @ .68 at 100m (no chrony). Have yet to go longer...hope to get out to the 300 soon.

 

[AckleymanII]

A lot of us are shooting Berger 168's with 70-71g of Retumbo with Fed 215, accuracy out of the walnut stock 700 with a brake is astounding to say the least, factory trigger re sprung & tuned. I had great luck with the 162g Hornady SST also.

Brother found a very accurate load with a 150g Nosler long range accubond after he figured out that the bullet liked .120 jump with N160, he shoots it in 3 rifles.

For many years, we have shot the 140g Nosler accubond and ballistic tip with 65-66g of IMR 4350 in rem brass with 9 1/2 primers on deer. Out of a factory rifle these loads will shoot 3" at 600 or less as we recently saw with tuned rifles with muzzle breaks.

In every 7 Mag I have ever shot, most bullets like touching the lands, the Nosler 150g Long range is the only one that is the exception.

 

[anrfknm]

Some of the powders mentioned in this thread are not in either of my reloading manuals. Would buying a newer addition solve that or is there another source.

 

[Duhawk]

Some of the powders mentioned in this thread are not in either of my reloading manuals. Would buying a newer addition solve that or is there another source.

I've got the latest Berger book....all the powders listed in this thread and then some are shown in the manual for the 7mag.

 

[vegas]

Some of the powders mentioned in this thread are not in either of my reloading manuals. Would buying a newer addition solve that or is there another source.

Check the powder makers website for data also. The Hodgdon website has some good info.