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I would like to see someone chronograph loads in the same barrel in a long throated 7RM, then the Mashburn and maybe the STW. Put a strain gauge on it and see what happens.
Maybe a bad idea might take the magic out of it. Sort of like reading Capstick's book on Pondoro Taylor it ruined everything.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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Campfire Outfitter
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Campfire Outfitter
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In Nosler's reloading guide they list 5 loads that shoot 160 grain bullets at 3,100 mv from a 24" barrel from a 7mm WBY.
Two of those loads nearly reaching 3,200.
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Campfire Regular
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Campfire Regular
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Nosler also says 140 accubonds will run 3300 with a 7RM. I don't shoot noslers but i'm guessing those are generous velocities given my recent testing.
I should stop reading this thread, I reallly want a hotter 7 and Bob is a good friggen salesman.
Wanted: Vintage Remington or Winchester hats, patches, shirts. PM me if you have something.
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In Nosler's reloading guide they list 5 loads that shoot 160 grain bullets at 3,100 mv from a 24" barrel from a 7mm WBY.
Two of those loads nearly reaching 3,200.
I wanted a 7mm Mag and thought hard about the Mashburn because of the negative press about pressure problems with the Remington Mag, but ended up with a good deal on a 7mm Weatherby instead. It gets very close to some of the numbers quoted by Bob for the Mashburn. Federal factory loads with 160 Trophy Bonded Tipped are cruising at a little over 3200 and shoot into 3/4". That load may be hard to top with handloading or even wildcatting.
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Campfire Ranger
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Campfire Ranger
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Then what do you use for a bullet seating die? Bullet seating dies are pretty generic. The length of stroke in your press would beg the bigger question.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Ranger
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This die set cost me $175 bucks. Doesn't this: $175 And this: 175 bucks ....mean the same thing? Sorry, couldn't resist.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Ranger
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Campfire Ranger
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Since I've been recently dissapointed with my 7RM handloads and a lover of the .284 maybe I need to look to a bigger case.
Came to the same conclusion. I stepped up to the 300 WSM and gave up all the twitterpatin' over the .284 minutia of this-is-better-than-that. I did retain my 280's in their original form.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Ranger
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Campfire Ranger
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I wanted a 7mm Mag......but ended up with a good deal on a 7mm Weatherby instead. Federal factory loads with 160 Trophy Bonded Tipped are cruising at a little over 3200 and shoot into 3/4". That load may be hard to top with handloading or even wildcatting.
I could not get my 160's to go above 3187 fps no matter what I tried in all three of my 7 Wby's. I wanted 3200+ with handloads. Couldn't get there. Now I shoot a 300 WSM with 150 AB's cruising at 3285 fps average and not straining anything. I like it much gooder.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Regular
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Reloader I consistantly get 3269 fps. over a Shooting Chrony using 76 gr. RL-25 and a 162 gr. Hornady from a 24" barrel out of my Mashburn. My case capacity is 90 gr. water or about 4 gr. over the 7 Weatherby. I only shoot 160 gr. +/- out of this gun and accuracy is consistantly .6" +/-. I am building another on a Rem 700 and will set it up for 175's; Sierra or Nosler. I intend to use Retumbo or H1000 if the gun will shoot that powder well and be done with it.
At 3269 I can reload the brass about 8-10 times before it work hardens in the neck to where I need to anneal it and instead I chunk it.
To me the Mashburh is effective, reasonably barreled (24"), light 8 lbs. +/-, and plenty powerful. What is not to like?
Warren Page was right. I bow to his superior wisdom.
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Campfire Ranger
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Campfire Ranger
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I could not get my 160's to go above 3187 fps no matter what I tried in all three of my 7 Wby's. I wanted 3200+ with handloads. Couldn't get there.
Now I shoot a 300 WSM with 150 AB's cruising at 3285 fps average and not straining anything. I like it much gooder.
Let me get this straight. You're disappointed when you can't reach 3200 with a heavy for caliber bullet in the 7 Wby but you're perfectly thrilled with a light for caliber bullet reaching 3285 even with the radically lower SD and BC of the 150gr. Bet you can't push a 180gr 30 caliber bullet to 3200 with the 300WSM. And you still don't have the SD of the 160 7mm. Did you consider a 140gr bullet in your 7 Wby?
The Chosin Few November to December 1950, Korea. I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Campfire Greenhorn
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Campfire Greenhorn
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Anybody got a pic of a 7mm mashburn super?
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Campfire Ranger
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Here's a link to a visual comparison of the Mashburn to the 7 RM, and the 7 Wby. 7mm Mashburn comparo Don't know how to post it directly here hence the link.
The Chosin Few November to December 1950, Korea. I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Campfire Tracker
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Anybody got a pic of a 7mm mashburn super? The search feature (and BobinNH) is your friend. http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/4460772/3
Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
Stolen from an erudite CF member.
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Campfire Greenhorn
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Let me get this straight......you're perfectly thrilled with a light for caliber bullet reaching 3285 even with the radically lower SD and BC of the 150gr. Did you consider a 140gr bullet in your 7 Wby? I briefly ran 140's, even took an elk with one, but I much prefer 150's in the 7mm & 308 calibers. My longest ever witnessed kill was 389 yards on a running pig. That shot was with a box stock 280 Rem with 150 CoreLokt commercial ammo. I am not interested in flight path characteristics as concerns sd's or bc's when it comes to hunting bullets. I just wanna hunt and am perfectly happy doing so with my current load in the 300 WSM. I have no concerns at all that it will take me out to 500 yards should I desire to do so. My current self imposed distance of engagement is no more than 300 yds until I get a good turret scope.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Ranger
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So, do you 7 MSM proponents think it'll fit in my 7 Wby Mk V action?
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Campfire Tracker
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Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
Stolen from an erudite CF member.
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OP
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Talking to Snowflake, another 7mm MSM user, and he pointed me toward an article on the 7mm Practical, which is essentially the same thing. So help me interpret what I'm reading here... http://www.ballisticstudies.com/Resources/Articles/The+7mm+Practical.++A+Practical+Magnum..htmlIf I'm reading this right, he formed the cases using a generic Hornady 7mm neck sizer with a 30 degree shoulder. Then he used a 7mm Rem Mag seating die. This is what I've been trying to figure out if I could do in order to make my rifle operational this year, not this coming winter. Tell me if I'm way off base here thinking I could pull something like this off.
"For some unfortunates, poisoned by city sidewalks ... the horn of the hunter never winds at all" Robert Ruark, The Horn of the Hunter
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And continuing this train of thought, guess which commercial 7mms have a 30 degree neck?
The RUM and RSAUM!
So, dare I go ahead and put my reamer to work now that I won't be crippled by $300 worth of form and sizing dies plus a 4 month lag?
Last edited by exbiologist; 07/16/11.
"For some unfortunates, poisoned by city sidewalks ... the horn of the hunter never winds at all" Robert Ruark, The Horn of the Hunter
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Campfire 'Bwana
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Campfire 'Bwana
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Anybody got a pic of a 7mm mashburn super? 257 can't recall if I ever posted one....Mmmm.....did Dober?
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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