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Old January 27, 2013, 05:50 PM   #1
Ironworker
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Custom barreled 7 WSM leaves other 7 mags in the dust ?

Today I chronograph ed my standard loads out of my 7 WSM today I have a Brux 26" SS 9" twist bbl. 69grs of Re#19 behind a Hornady 139gr SST produced an average muzzel velocity of 3550 ! I couldn't believe it ? I then shot my 22 auto pistol through the chronograph and it read 1100 fps and that was what it should've been. Then my 45 auto 890 fps so was that ! So thumbs up for Brux bbls !!!!
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Old January 27, 2013, 09:18 PM   #2
Art Eatman
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Interesting. The rule of thumb has been that the shorties use 15 or 20 percent less powder than the big brothers, but lose only 10 percent on muzzle velocity.
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Old January 27, 2013, 10:35 PM   #3
reynolds357
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I would question the chronograph. The RUM wont do that at safe pressure. I have a 30" 7WSM 1000 yd rifle that will not even come close to that. Either the Chronograph is wrong or you are running some unreal pressure.
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Old January 27, 2013, 10:44 PM   #4
Savage99
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Two new manuals show 3300 fps for max. loads in the 7mm WSM with 140 gr bullets.

I question your chronograph.

The velocity does not matter all that much to me. I have had chrono's for 50 years.

How does it shoot?

Does it stay sighted in for that first shot?
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Old January 28, 2013, 10:24 AM   #5
AllenJ
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Ironworker, congrats on you rifle. What are you going to use it for? I'm having a 7 WSM made using a Lilja barrel, I hope I'm a statisfied as you.
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Old January 28, 2013, 12:25 PM   #6
Scorch
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Quote:
Today I chronograph ed my standard loads out of my 7 WSM today I have a Brux 26" SS 9" twist bbl. 69grs of Re#19 behind a Hornady 139gr SST produced an average muzzel velocity of 3550
Quote:
Two new manuals show 3300 fps for max. loads in the 7mm WSM with 140 gr bullets.
My Hornady manual says 3200+ fps with that combination (Hornady manuals are pretty conservative). He's getting 10% additional velocity, that is not unusual or out of the realm of possibility.

How does it shoot?
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Old January 28, 2013, 01:40 PM   #7
Ironworker
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Bench work

I shoot off a sheet of plywood over the bed of my truck using front and rear rest.After a couple of fouling shots Its under MOA I think. Soon as its sighted in I start shooting water filled Rock Star cans and have blown them up at 425 yds. I use to live in SF Bay area and shot at local range off a bench in perfect conditions. I don't have that up here in the Nevada Desert so being able to hit tin cans at 400+ yds is accurate and a good shooter to me.
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