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Short Mag fps

 
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  #1  
Old 04-22-2008, 12:11 AM
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Short Mag fps

Thanks Ballistic64 for giving the info on the other thread. Would some others mind giving some good load data on their short mags. Any caliber. I am looking at doing a new backpack rifle on a short light action and would like to see what some good loads do in this line of cartridges over a chronograph. I am sure this thread has been run somewhere and my appologies if it has but this would be some good info for a lot of guys without a lot of experience with these. Ballistic64 opened my eyes a bit with that load of h414. Gives me the idea of a shorter 24" light tube if it does well at that burn rate. Good accuracy in a short lightweight rifle with good velocity is what I am looking for. These short mags were not out when I did all my guns.
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Old 04-22-2008, 12:41 AM
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We're getting 3030 fps with H-4350, 140 Accubond in a 270 WSM. 0.50 groups @ 100 yds in a 23" Stainless Stalker.
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Old 04-22-2008, 04:09 AM
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3040 fps with a 160 gr. accubond,67 grs.7828ssc,fed215m in a7mm wsm. with a 27 inch barrel. Shoots 1/2 moa.
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  #4  
Old 04-22-2008, 09:42 AM
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7WSM-175 Match King-2930fps--180 Berger-2900fps
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  #5  
Old 04-22-2008, 07:29 PM
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Browning Shorttrac .270 WSM - 130 gr Barnes TSX - 63.5 grs RL19 - F215M - Right at 3005 fps - .5 MOA

Remington 700 .270 WSM - 130 gr Barnes Tipped TSX - 63.0 grs RL19 - F215M - 3200 fps - .5 MOA
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  #6  
Old 04-22-2008, 09:29 PM
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I love the 270 wsm and the 7mm wsm. The 300 is another story. It could be made to be more than a glorified 30-06 if it was custom done with a long throated reamer and a long action but as is from the factory, it is pretty dissapointing.

140 Accubonds will get you 3100-3250 in the 270 WSM and crank gongs well at 1k.
160 Accubonds will go 3000-3100 in a 7 WSM and really hit gongs hard at 1k.

I've had great luck with IMR4831 and IMR4350 in the 270 and Imr 7828ssc works awesome in the 7.

The 300 WSM with 180's or 165's just doesn't hold enough powder if you are seating the bullets to work in any factory length magazine. It gives you a working grain capacity of 62 or 63 grains and that puts the optimum burn rate right in the H414, W760 range which stinks in my opinion. Ball powders are too unpredictable in temps swings to work well for long range in my opinion. IMR4007ssc is the only stick powder that is in this burn rate but it doesn't have the same pressure curves as ball powders, and although it shoots great in the 300 wsm, speeds are barely more than what I can wring from a 30-06.
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  #7  
Old 04-22-2008, 11:08 PM
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Quote:
Originally Posted by Long Time Long Ranger View Post
Good accuracy in a short lightweight rifle with good velocity is what I am looking for.
I have a tikka t3 lite 270 wsm with a 24" barrel that's very light, very accurate, and inexpensive. The trigger is great. I don't have a chrono yet but remington says that the 150 accutips I use get 3160 ft/sec. That's what I plug into JBM's ballistic calculator and the given drops are dead on out to 1000 yards. The bullets, which I think are Hornady SST's, have a BC of .525. At my elevation of 5000ft, they still have 1000 ft/lbs at 1000 yards.
Accurate Powder lists a load with a 150 gr bullet that gives 3136 ft/sec with Magpro. http://www.accuratepowder.com/data/P...%202004%20.pdf That's what I'm going to try when I get a reloader.
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