Rebarrel a Model 7 300 SUAM to 270 WSM

Darryle

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I am a 270 guy so asking me would be as biased as they get. I would definitely go with the 270 WSM. 1:8" barrel and start with the 150 monos and the heavy Bergers. 150 - 175 grain.
I want to make one of my 270 WSM's into a heavy slug shooter. so planing a barrel swap to a 1:8" or 1:7" twisted 26" barrel and a better scope.
Consider 26” barrel on that sweet 270 WSM. 140 accubonds @ 3150 - 3200 hard to beat. You will enjoy
Doesn't the 26" barrel kinda defeat the purpose of using the Model 7 action?

To add to the madness, I have a buddy trying to convince me to go with a 6.5 PRC, I just don't think I will gain enough to make me happy, that and I have grown to dislike anything 6.5 because of the Creedbros.
 
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freddiej

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Darryle, I do not see the 26" barrel as defeating the purpose of the Mod-7 action choice. I see it as making the best use of the case's powder charge. you can use anything from a 20" to a 26" with all powders used. I like the 26" barrel with a tight twist due to the powder that both of mine seem to like. Both of mine wear a 24" barrel at the current time. the long range one should wear a 26" to make the powder burn more complete. if you want as compact a rifle as possible, the WSM does well with a 20" barrel but the speed is compromised a bit and the bark of the unburnt powder is bigger. if you are slinging 130 or 140 grain slug then, yes the 20" barrel will serve you better than the longer barrels. the trade off is the 24"; most of the powders are at 80% full burn in a 24" barrel. I see you are in Texas and have lots of flat land like eastern Montana. I have a little experience up in Montana. umm, the 22" to 24" is a good medium barrel length to use. the 1:9" twist is good with longer ranges and 150 grain slugs. not knocking the 20" to 22" barrels. You still can use a 20" to 22" with a 1:9" twist and 150 grain slugs. depending on range shot I believe I would use a 20" or 22" out to 300 yards, 22" to 24" out to 450 yards, beyond that I would start thinking 26" barrel for the 270 WSM.
I helped built a 20" barreled 1:8" twist 270 WSM last year for a hunter in Pensilvania. he loved it. I also used a fluted barrel that was a heavier profile than he asked for so his gun balanced right. his shots are never over 400 yards. Most of his shots are under 250. that gun really works for him.
as for the 6.5 guys.. I hear you. I have my own friends lecturing me on 6.5 MM and 7MM as far better than my 270's. fact of the matter is they come to me for reloading, brewing up loads, slug selection, weights, brass recommendations, and all this.. but never for the caliber. I still out shoot them. I still have to back them up once they wound a deer or speed goat, or what ever. I am just tired of people telling me what is better than my 270's.
Darryle, honestly.. if you want a super compact rifle, based off the Rem mod-7, I would probably go to a 18" to 20" barrel with a muzzle diameter of 0.625" to 0.700", heavy fluted for cooling and weight reduction, Talley one piece lightweight base and ring combos, call up Chet Brown (Brown Precision) in California for a Classic model 7 "Pounder"(Kevlar stock), good Kick-EEZ recoil pad, Leupold 4.5-14 X40MM VX3 with a B&C reticle. Unless you think that a larger magnification is required for your range you intend to shoot, then VX-5 HD 3-15X50MM. I hope I have not offended you in any way here.
 

Darryle

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Weatherford, texas
Not at all Freddie, I really appreciate the advice, I can always have a 26" installed and chopped to a shorter finished length.
 

freddiej

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Darryle, cool. I hope the rifle comes out great for you. I just want to get my 270 WSM done. I want to get a slightly longer, slightly heavier fluted barrel on this one win 70 I have and then start whacking away with the heavy slugs. IF I had my old dies and such I would have a friend build me the old rifle I had up in Montana.. it ****ed the 7MM R/M cult followers off to no end.. a 270 wildcat off the 7MM R/M case. it was such a fun gun to shoot and it flung 150 Barnes like you would not believe. It had a 1:8" twist barrel. I miss that rifle.
 

N2TRKYS

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What kind of velocity are you hoping to get out of your 270 WSM with 150s? And at what barrel length?
 

freddiej

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N2Trkys, you can slow the speed down approximately 35 to 50 FPS per inch from 26 inches.
With 67.5 grains of H-1000, at 24" barrel 3,000 FPS: 22" 2900, 20" 2800 FPS
With 71.0 grains of IMR 7977 at 24" 3050 FPS, at 22" 2950 FPS, at 20" 2850 FPS
with 60.0 grains of H-4831 at 24" 2960 FPS, 22" 2860 FPS, 20" 2760 FPS
With 57.0 grains of H-414/W760 at 24" 2990FPS, 22" 2890 FPS, 20" 2790 FPS
this is based on an average SAAMI chamber, Winchester cases, Win LRM Primers, and my interior balistics program and the Hodgdon's manual. Qick load and Hodgdon's are within 10 FPS of each other like clockwork.
 

N2TRKYS

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N2Trkys, you can slow the speed down approximately 35 to 50 FPS per inch from 26 inches.
With 67.5 grains of H-1000, at 24" barrel 3,000 FPS: 22" 2900, 20" 2800 FPS
With 71.0 grains of IMR 7977 at 24" 3050 FPS, at 22" 2950 FPS, at 20" 2850 FPS
with 60.0 grains of H-4831 at 24" 2960 FPS, 22" 2860 FPS, 20" 2760 FPS
With 57.0 grains of H-414/W760 at 24" 2990FPS, 22" 2890 FPS, 20" 2790 FPS
this is based on an average SAAMI chamber, Winchester cases, Win LRM Primers, and my interior balistics program and the Hodgdon's manual. Qick load and Hodgdon's are within 10 FPS of each other like clockwork.
Thanks for the info. I’m getting close to 3000fps with 150 grain Partitions in my 22” barreled 270 Win with RL26.
 

freddiej

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N2TRKYS, Both of my 24" rifles are getting close to 3200 FPS with 140 Barnes TTSX and H-4350. I have yet to shoot 150's from either of them. The last Elk shot with my Kimber Montana just laid down and died. I just could not have asked more of that rifle cartridge combo. 373 to 375 yards depending on whose range finder you believe.
 

N2TRKYS

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N2TRKYS, Both of my 24" rifles are getting close to 3200 FPS with 140 Barnes TTSX and H-4350. I have yet to shoot 150's from either of them. The last Elk shot with my Kimber Montana just laid down and died. I just could not have asked more of that rifle cartridge combo. 373 to 375 yards depending on whose range finder you believe.
I haven't tried any of the Barnes bullets, yet. They seem to be a faster bullet, from what I've seen/read.

I've only killed one elk. I had my 7 SAUM setup to shoot 400 yds without dialing. I shot it at less than 100 yds. Lol
 

freddiej

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Carson City, NV
I haven't tried any of the Barnes bullets, yet. They seem to be a faster bullet, from what I've seen/read.

I've only killed one elk. I had my 7 SAUM setup to shoot 400 yds without dialing. I shot it at less than 100 yds. Lol
My old 270 H-Mag was set up with a S&B 4-16X50 PM-II. the 150 grain Barnes X-bullets were devastating on Elk while I was up in Montana. lost the rifle to some thief on the end of the last season I was up there. I might have found it. but I do not know for sure.. waiting on the guy to get back with me on the serial number.
7MM at 100 yards... the slug should have barely slowed down. should have been a really hard impact on that Elk.
 

N2TRKYS

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305
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Alabama
My old 270 H-Mag was set up with a S&B 4-16X50 PM-II. the 150 grain Barnes X-bullets were devastating on Elk while I was up in Montana. lost the rifle to some thief on the end of the last season I was up there. I might have found it. but I do not know for sure.. waiting on the guy to get back with me on the serial number.
7MM at 100 yards... the slug should have barely slowed down. should have been a really hard impact on that Elk.
160 grain Partitions did a number on him. He dropped within a couple of feet from where I shot him.
019BFBE1-4FF0-4517-94AE-18A86C5721CB.jpeg
 

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