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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
What I really like about the Mashburn is that it's consistent across a wide range of rifles. I have taken loads that shot very well in Dober's, Bob's, and Lakers rifles and seen the same results accuracy wise in my gun. It seams that a load that shoots well in one shoots well in any other Mashburn. I think I took my fire forming load from Dober. 140gr. Nosler BT and 65gr. IMR4350. Mild recoil and it's no slouch either. Running 3184, 3174, and 3180 and with zero load work it shoots like this. ![[Linked Image]](http://i1163.photobucket.com/albums/q557/les760/23329438-090D-4AD0-8F95-D26FC83CE08B_3.jpg)
Want To Buy;
Form die for a 7mm Mashburn Super.
.284 Hornady AMax 162gr.
.224 Hornady AMax 75gr.
22-250 bushing die
Bushing die that will work with the 7mm Mashburn Super
A couple Glock 42 380ACP mags
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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
Here are some numbers that I got from H1000 and a 162gr. AMax and never ran into any pressure signs. ![[Linked Image]](http://i1163.photobucket.com/albums/q557/les760/A84A6EE9-D7AD-4A9D-96AA-7102088A691D.jpg)
Want To Buy;
Form die for a 7mm Mashburn Super.
.284 Hornady AMax 162gr.
.224 Hornady AMax 75gr.
22-250 bushing die
Bushing die that will work with the 7mm Mashburn Super
A couple Glock 42 380ACP mags
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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
It really wants to scream with R22 and a 150gr. Partition. I stopped at 3300 with no signs of pressure. I dropped it back to 3250 and would feel 100% confident putting one behind the shoulder of the biggest brown bear in NA. ![[Linked Image]](http://i1163.photobucket.com/albums/q557/les760/FAFD8B7F-E27D-4289-8CC8-F2D9F88A20F3.jpg)
Want To Buy;
Form die for a 7mm Mashburn Super.
.284 Hornady AMax 162gr.
.224 Hornady AMax 75gr.
22-250 bushing die
Bushing die that will work with the 7mm Mashburn Super
A couple Glock 42 380ACP mags
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Aug 2002
Posts: 14,466
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
Posts: 14,466 |
I have never gotten over 2900 with a 150 without very high pressures. I am going to try R26 and 7977...perhaps they will deliver more. I've burned both Norma MRP and RL 26 and easily get 3K in a 22" barrel. http://www.norma.cc/en/Ammunition-Academy/Loading-Data/270-Winchester/
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Joined: Mar 2008
Posts: 3,508
Campfire Tracker
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Campfire Tracker
Joined: Mar 2008
Posts: 3,508 |
SU
Man I hope so. I have thought that 150 @ 3000 is just perfect.
I pick up my 1-9 270 on Friday. Looking for R26!
Thanks.
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”.
Antoine de Saint-Exupery. Posted by Brad.
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Joined: Jan 2006
Posts: 5,625 Likes: 1
Campfire Tracker
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Campfire Tracker
Joined: Jan 2006
Posts: 5,625 Likes: 1 |
Whelen Away: Here you go. I think this is a drawing of my Mashburn reamer so you can play with numbers. My eyes are too fuzzy in the middle of the nite to start playing with numbers.  I have measured once fired Masburn WW cases many times. They hold 90 gr of water to mouth of case. Ditto for all my pals who now have Mashburns. Other than a shorter neck there is precious little difference between the Mashburn and the 7mm/300 Win. They are both very good cartridges. ![[Linked Image]](http://i1187.photobucket.com/albums/z395/BobinNH1/20141215_110930.jpg) Thanks Bob. Understand that there is no real performance difference, and the Mashburn has the nice long neck.
FÜCK Jeff_O!
MAGA
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Feb 2009
Posts: 4,418
Campfire Tracker
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OP
Campfire Tracker
Joined: Feb 2009
Posts: 4,418 |
Bob and I have been fooling around with the 7 RM since the early 80's.
I had an Echols Legend and several others. I tried longer throats.
All had very good custom barrels. The best you are going to get, on average, is 3200-140, 3125-150, 3050-160, and 2950-175. If you get much more it is because of higher than normal pressures.
I have had so many custom 270's that I can't count them. The longest were 25". I have never gotten over 2900 with a 150 without very high pressures. I am going to try R26 and 7977...perhaps they will deliver more.
Is the 7 more? Well yes the numbers are bigger, no question. Does it translate into a decisive in the field difference? I can't see any difference until you get to the 175's and then the big 7's are more like the big 30's. Me, I can't tell the difference in recoil between a 175 or a 180 at 3000+. Both have more recoil than I want to deal with so I use a 270.
The 7 RM is what it is...very good but neither magical nor mystical. Actually, I don't think anything is. Here is the link to the .270 Win RL26 data. I am running about 1.5 grains below their listed max and getting 2985 out of a 150 NPT, which seems in line with the data. 1/2" accuracy with this load. It is a 24" Shilen, I believe. http://www.alliantpowder.com/reload...ight=150&shellid=63&bulletid=367
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Joined: Apr 2011
Posts: 15,304
Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
Posts: 15,304 |
I just bought an early 80s Rem 700 Classic in 7mm Rem. Got it home and think it is unfired. I may have to get an action wrench and some take off barrels and do some experimenting. Run a MSM reamer in that rifle. For 150 bucks you'll get to experiment with the MSM to see if you like it. I did the same and am enamored with it. FF loads rock, 150's at 3300, 160's at 3200 and 175's at 3050, all with H1000, Retumbo or RL26. Really isn't fussy and it does it all with a 24" tube. I was another long time 7mm Rem Mag guy but the MSM does it all with ease...
Semper Fi
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Joined: Mar 2008
Posts: 3,508
Campfire Tracker
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Campfire Tracker
Joined: Mar 2008
Posts: 3,508 |
Bob,
We have been fiddling around with big 7's since the early 1980's. We would have been far ahead to have built a couple of Mashburn's back then. I should have learned from Page and Hagel.
Doing so would have saved about $20,000 worth of 7's which never quite did what I wanted, which was a 175 at 3000+ out of a 22" barrel. With current powders it is even better.
My idea of a perfect pair is an 8 pound Mashburn and a 270 weighing about a pound less. Some overlap but each a little better than the other for some applications. Warren and Jack had it figured out by the 1960's.
Let's go to Africa. The game populations are way too high.
Last edited by RinB; 05/19/16.
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”.
Antoine de Saint-Exupery. Posted by Brad.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Rick I agree. I think the old-timers fleshed this crap out a long time ago, but the propensity of every rifle nut is to run around in a blind haze trying to learn for himself....  What I find interesting is that as we all run around in different directions we are recycling wildcats that date back to the 50's and 60's,are nothing really new, but do as well as most any of the modern cases,except of course those like the RUM's which are far bigger,but less efficient. Not sure how popular they are. The Mashburn would have saved us both a pile of money. Had I built it when I was younger, I would have used it everywhere I used a 300 magnum of any sort and with the same results. Even friend Kent D says the same thing. Africa sounds good. Those herds need to be held in check.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jul 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 1,702 |
Is it bad that I'm thinking of building another Mashburn?
Last edited by pathfinder76; 05/19/16.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Is it bad that I'm thinking of building another Mashburn? No comment because I never recommend what people should build for themselves. One question: How did your first one work? I know it's worth asking you because you shoot a lot of animals.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jul 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 1,702 |
It worked very well. As you know, some of this stuff is hard to quantify in the field. I shot animals with the 145 LRX, the 150 TSX, 160 North Fork and the 150 BT with it up in size to a couple of Moose. All were decisive finishes. The accuracy was superb and as you know numbers jived with what you have seen.
I did get donuts but as far as I can tell they never caused issues. TN also gets donuts and he reams them out but he's not sure if it makes any difference.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Yes I was aware of the donuts. But only after Rick Camuglia mentioned them and showed how to fix them. Then my pal Matt ran into it with Norma brass. Rick cleans that up first firing. DArcy mentioned them. I really don't know if I have them or not .I am pretty sure guys who had them used Norma brass. I use WW. No accuracy issues through 5-6 firings. So I sat out that conversation. Maybe I do have them? Can you stay 3/4 to 1 moa to 600 if you have them? Sounds like it worked well on BG and did what you wanted.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jul 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 1,702 |
Bob, I know I had them and mine was a drill accuracy wise.
I'm curious as to what Rick does to clean them up.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
He turns the outside of the neck. He posted a bunch of pics. Think the thread was about shooting his to 1500 yards or something. Cant remember.
He gave a tutorial on here about forming the case.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Jul 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 1,702 |
I'll have to see if I can find it.
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Joined: Jul 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 1,702 |
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