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Got a Rem 700 Stainless 300 win Mag and a Rem 700 ADL in 7 Rem Mag in stock config and they both shoot well. I'm bored and trying to decide on which one to go custom on and leaning towards the 7 RM for a '23 elk hunt. I have plenty of reloading components for both and don't want to wildcat one or the other.

- Caliber - Most likely 7RM - shooting 175-180 grain pills (love the 7mm bullets)
- AG alpine hunter or McMillan Game Hunter carbon stock (have a bunch of McMillan's and want to try another maybe?)
- Proof Sendero light carbon barrel at 21" or 22"
- Detachable or blind magazine
- Suppressor will be my Omega 300
- Weight goal all loaded with Suppressor (10.5 lbs max)
- NXS 2.5-10x42
- I hate recoil

Questions:
1) Any of you have any builds in the Rem Mag or Win Mag with a 20-22" barrel for a suppressed rig...like it?
2) Is there anything out there for ADL/BDL that would allow 3 magnum rounds in the belly without a detachable mag?

FWIW: I have a Southern Precision Rifle (SPR) built .280 AI @ 7.4 lbs that has taken an Elk and Muley with 160 partitions. It sports a #2 rock barrel and I won't attempt to suppress it. Been a while since I've posted.



Last edited by BBsteel; 10/14/21. Reason: Incorrect gunsmith listed

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I believe you are wasting a lot of powder with those short barrels on magnums.. Might as well go with a 7mm-08 and a .308 that short./


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I believe you are wasting a lot of powder with those short barrels on magnums.. Might as well go with a 7mm-08 and a .308 that short./


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I'd go 8 twist 7mm barrel, 21", blind magazine, and throat cut to allow 180 scenars to work nicely. Look for RL26, H1000, or Retumbo. Good luck.

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I have a Sig SHR 970 in 7 Mag that I had cut to 21" and threaded for a can. It's absolutely lights out on MT elk, very low recoil (thanks to the can...I run a Sandman Ti) and an absolute pleasure in the field. I use 139 gr GMXs in my reloads and they work great on the smaller elk that I prefer to eat.


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PTG canoe style bottom metal will allow you to get 3 down easily in a BDL. Make sure you get the right mag box length. I've put these in every 700 I own/have owned.
https://pacifictoolandgauge.com/141...-well-canoe-floor-plate-bottom-metal-bdl

I think you'd want to go 20-21" with an Omega, unless you want a very long rifle. A 20" 7mm mag will definitely beat a 20" 7-08, by a lot.

I have a handful of suppressed WSMs with 5" cans and 22" barrels. Longer that this and they get pretty unwieldy but everyone has their own standard.

Why not suppress the Beanland? Just about all my rifle cans are hung on either sporter weight or #2 barrels. I have a suppressed model 7 with a 7" suppressor on a factory pencil barrel (though it's short). No impact on mechanical accuracy, some improvement on practical accuracy, especially on the magnums. The Model 7 barrel looks like a sewer pipe inside but still shoots 120 NPTs into .4 Moa with a 7 inch can. If I put a 9" can on it, accuracy drops to 1moa--not sure if its the weight or the longer lever, etc.

You have plenty of options.

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Tx35, Exactly what is the speed of a 20" 7mm mag? Maybe I am missing something...


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Originally Posted by WyoCoyoteHunter
Tx35, Exactly what is the speed of a 20" 7mm mag? Maybe I am missing something...


I don't know either the whole idea sounds retarded to me. Mb


" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
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Feel free to read Mule Deer's extensive discussions about this. But in my personal experience, shortening and threading a bunch of different barrels for supressors--same barrel, same chamber, same ammo--
7WSM lost 38fps per inch cut (Win factory 150gr power points)
300 Win Mag lost 34 fps per inch (Fed factory 180 partitions)
338 Win mag lost 30 fps per inch (Fed factory 250 partitions)

It's not magic. 70 grains of powder burning in 20 inches of barrel makes the bullet go faster than 45 grains of powder burning in the same space.

Have you done this yourself and gotten different results? Or are you repeating something you read? Or do you not remember?

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I like long barrels on unsuppressed rifles but if you're suppressing something you're going to end up with a short barrel to keep the rifle portable. Everyone who shoots with a can knows this; we all have data on our short barrels and our long barrels.

So unless you've actually done this yourself and chronoed the results, you're just talking bullchit.

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Originally Posted by Magnum_Bob
Originally Posted by WyoCoyoteHunter
Tx35, Exactly what is the speed of a 20" 7mm mag? Maybe I am missing something...


I don't know either the whole idea sounds retarded to me. Mb



Doesn’t seem retarded to me. Probably be 120-150fps loss going from a normal(ish) 24” to 20”. Still a lot more gas in the tank than a 20” 7-08.


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Originally Posted by TX35W
So unless you've actually done this yourself and chronoed the results, you're just talking bullchit.

That’s damn near sig line worthy.

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That is why I ask.. I can't feature a 20" .300 or 7 mag. So that would make a .300 drop from 3100 with a 180 to 2850 fps..


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Wyo, but if one is dialing a scope, that's a mute point.

Better rangefinders, better bullets and better dialing scopes shun old-school thought that it's gotta be "x" speed to be worthwhile.


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Go 6.5 PRC at 24" and forget about the suppressor.....

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Jeff- care to expound on "forgetting the suppressor"?


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SK, I see your point, But where I hunt you often don't get time to range and dial.. But if that's what the point is I see what you mean... Thanks.


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SK, I see your point, But where I hunt you often don't get time to range and dial.. But if that's what the point is I see what you mean... Thanks.


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Originally Posted by WyoCoyoteHunter
SK, I see your point, But where I hunt you often don't get time to range and dial.. But if that's what the point is I see what you mean... Thanks.

A 136 fps drop in velocity between a 24" and 20" in a 300 Win Mag with a 180 Accubond will make a whopping 1.8" difference in drop at 400 yards in the atmospherics I generally hunt. If one is worried about point and shoot capability, cutting the barrel down a few inches isn't going to screw up your plan.

To the OP, 20" would be good for a dedicated suppressed rig, and only that long because the can isn't rated for shorter lengths in "magnums".

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BBsteel Offline OP
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I figured this would drive a few opinions. Appreciate the responses from all and thanks. Really like that PTG link on the canoe style, thank you TX35W! I found some great studies on accurateshooter.com cutting down the 7RM and the 300RM from 28" to 20" in 1" intervals. Not to shabby on the fps loss.

Also have a Beanland 7-08 with a rock #3 finished at 22"....don't think it will sling 168's or 175's as fast though!


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