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Joined: Apr 2001
Posts: 28,277
Campfire Ranger
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Campfire Ranger
Joined: Apr 2001
Posts: 28,277 |
I'd be kind of suprised if you didn't get there with the big 7 and 7828 or R25.
I'd not want to try to get there with the WSM, my experience was it would run within 100 fps of the 7 Rem but that was it. The factory ammo is IMO too hot and I couldn't sanely dupe it..
I have some 180's and could try them out of my 25" Mashburn again but they shot so poorly in it that I just couldnt get into working up a load with them.
Dober
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy
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Joined: Nov 2006
Posts: 286
Campfire Member
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Campfire Member
Joined: Nov 2006
Posts: 286 |
3000 with a 180 and 27" barrel in the 7Mag is pretty easy using Retumbo. Most of my builds run just over 3000fps with a 26" barrel using Retumbo. The 27" builds are running between 3050-3100 depending on barrel. The 7wsm's seem to be running 2950ish area.
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Joined: Aug 2002
Posts: 14,472
Campfire Outfitter
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OP
Campfire Outfitter
Joined: Aug 2002
Posts: 14,472 |
3000 with a 180 and 27" barrel in the 7Mag is pretty easy using Retumbo. Most of my builds run just over 3000fps with a 26" barrel using Retumbo. The 27" builds are running between 3050-3100 depending on barrel. The 7wsm's seem to be running 2950ish area. TMR When I get all my components I may have to drive up and see you.
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Joined: Mar 2010
Posts: 47
Campfire Greenhorn
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Campfire Greenhorn
Joined: Mar 2010
Posts: 47 |
Talk about a supersonic spear!
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Joined: Nov 2006
Posts: 286
Campfire Member
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Campfire Member
Joined: Nov 2006
Posts: 286 |
3000 with a 180 and 27" barrel in the 7Mag is pretty easy using Retumbo. Most of my builds run just over 3000fps with a 26" barrel using Retumbo. The 27" builds are running between 3050-3100 depending on barrel. The 7wsm's seem to be running 2950ish area. TMR When I get all my components I may have to drive up and see you. Look foward to it. I usually have a couple 7mags in process at all times. Its the next popular caliber behind the 338 Edge that I build.
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Joined: Dec 2002
Posts: 13,106
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2002
Posts: 13,106 |
In the process of building a 7mm-300 WBY for just that bullet. Goal is 3100 fps. Reamwer was shipped yesterday. We will see!
NRA Benefactor Member
Those who live by the sword get shot by those who don't.
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Joined: Aug 2002
Posts: 14,472
Campfire Outfitter
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OP
Campfire Outfitter
Joined: Aug 2002
Posts: 14,472 |
In the process of building a 7mm-300 WBY for just that bullet. Goal is 3100 fps. Reamwer was shipped yesterday. We will see! Very interesting Dennis, didn't know that. What components are you building on? Brand of barrel and what length?
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Joined: Oct 2001
Posts: 906
Campfire Regular
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Campfire Regular
Joined: Oct 2001
Posts: 906 |
If the load data is the same basically for the 7RM and 7 WSM, why shouldn't one do what the other will do? I see it posted a lot that the 7 WSM is going to be about 50 to 100 fps slower than the 7RM, but it has not been my experience and all factory loads for the 7 WSM beats Factory Loads for the 7 RM. Am I misssing something?
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Joined: Aug 2002
Posts: 14,472
Campfire Outfitter
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Campfire Outfitter
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Posts: 14,472 |
but it has not been my experience and all factory loads for the 7 WSM beats Factory Loads for the 7 RM. Am I misssing something? Factory WSM ammo is loaded to higher pressures.
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Joined: Oct 2001
Posts: 906
Campfire Regular
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Campfire Regular
Joined: Oct 2001
Posts: 906 |
That's true but the loading data for each cartridge is the same. Why wouldn't the performance be the same, not 100 Fps less as gets posted quite often. I just use the data that's listed in the Nosler#5 for the 7RM for my WSM and according to my clock the velocities are right in line with no problems that I can see. Ramshot & Hodgdon show the same data for both cartridges also.
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Joined: Feb 2007
Posts: 1,538
Campfire Regular
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Campfire Regular
Joined: Feb 2007
Posts: 1,538 |
According to this website, the case capacity of the two cases is almost identical (83 vs 83.2). I too would assume that the two cases would therefore have similar velocities. http://www.chuckhawks.com/rifle_case_capacity.htm
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Joined: Feb 2008
Posts: 293
Campfire Member
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Campfire Member
Joined: Feb 2008
Posts: 293 |
Bob, Read this article here: http://www.6mmbr.com/gunweek071.htmlThis guy is getting 3000 out of a 7mm-300WSM with 180 bergers and 66 grains of RE25.
Rick
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Joined: Mar 2006
Posts: 1,010
Campfire Regular
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Campfire Regular
Joined: Mar 2006
Posts: 1,010 |
what is the minimum twist rate to stabalize the 180 berger their site says 1:9" but I have read articles where a 1:9 did not stabalize the 168 berger
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Joined: Sep 2007
Posts: 1,707
Campfire Regular
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Campfire Regular
Joined: Sep 2007
Posts: 1,707 |
I 1:9 should stabilize the 180's, especially with velocities in the 3000fps range. Could always go 1:8.5 just to be safe though. I have a factory Sendero in 7STW that stabilizes the 180's and I believe the ROT for that rifle is 1:9.5 - these were going around 3100fps.
A 9 twist will easily stablize the 168 VLD's. I shoot these in a 280AI with a Broughton 1:9 in the low 2900's.
Kevin
Last edited by KDF; 04/09/10. Reason: sp
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Joined: Jun 2004
Posts: 3,123 Likes: 1
Campfire Tracker
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Campfire Tracker
Joined: Jun 2004
Posts: 3,123 Likes: 1 |
SU35, The 7Dakota would have a little more capacity than the 7RM, and be the same case length, 2.5". Don't know if it could match your bolt face though.
RR
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Joined: Aug 2002
Posts: 14,472
Campfire Outfitter
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OP
Campfire Outfitter
Joined: Aug 2002
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RR, the Dakota would be ideal. Don't know enough about it's brass $$$. I'll check it out.
I just bought a new 700 SS SPS 300 RUM here yesterday, it's going to be the donor.
I'll be changing out the magazine.
Anyone want a new 300 RUM SS 26" I'll have one for sale.
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Joined: Feb 2002
Posts: 13,661
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2002
Posts: 13,661 |
Hey, before you part it out, work up a load with a 130gr TTSX and flame a few pronghorns/coyotes/brush apes first! I'm thinking the speeds that a RUM could spit those out would be fun for a bit...
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Joined: May 2009
Posts: 17,269
Campfire Ranger
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Campfire Ranger
Joined: May 2009
Posts: 17,269 |
Anyone want a new 300 RUM SS 26" I'll have one for sale.
price? PM me
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Joined: Aug 2002
Posts: 14,472
Campfire Outfitter
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OP
Campfire Outfitter
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
Posts: 30,944 Likes: 1 |
A 7mm RUM will get over 3000 with a 180
I got banned on another web site for a debate that happened on this site. That's a first
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