Author Topic: Compact velocity?  (Read 521 times)

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Offline flathead

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Compact velocity?
« on: March 22, 2007, 06:23:01 PM »
Has anyone chronographed M. vel. on a compact in any caliber with factory ammo? I'd like to compare it to the Reminton charts to see how much velocity I can expect to lose with the 16.5 barrel. I'm either buying a 260 or 708. I'd like the 708 more (200 yd and in deer rifle) but am leary of the muzzle blast. I'm hoping to find one to shoot around here. Like finding a needle in a haystack. I'll handload Barnes 140gr probably to compensate for less velocity. The factory load velocities (with the 16.5") will help me extrapolate the numbers I need. I basically need to know if these two rounds will be lightened up below a 243 when its all said and done. Any help would be greatly appreciated. God Bless!

Offline deerman12

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Re: Compact velocity?
« Reply #1 on: March 23, 2007, 07:11:34 AM »
Hello, I hope this works.  If it does not go to www.shootingtimes.com.  There is a great article that will answer your question.
SHOOTING RUGER's 7mm-08 MODEL 77 MARK II COMPACT
FACTORY LOAD VELOCITY (fps) STANDARD DEVIATION (fps) 100-METER ACCURACY(inches) 200-METER ACCURACY (inches)
Remington 120-gr. HP 2850 26 1.25 2.50
Federal Hornady 139-gr. SST 2698 14 0.50 1.13
Hornady 139-gr. SP Light Mag. 2850 19 0.75 1.63
Federal 140-gr. Nosler AccuBond 2660 11 0.38 0.88
Remington 140-gr. AccuTip 2717 20 0.88 1.50
Winchester 140-gr. Ballistic Silvertip 2647 10 0.63 1.25
Winchester 140-gr. Power-Point 2660 22 1.25 2.63
Speer 150-gr. Hot-Cor SP 2763 17 1.13 2.50
Accuracy is the average of five three-shot groups fired from a sandbag benchrest at the range specified. Velocity is the average of five rounds measured 10 feet from the gun's muzzle




I've never handled faster pointing rifles than these short new Rugers.



Short Barrel

Offline Slamfire

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Re: Compact velocity?
« Reply #2 on: March 30, 2007, 07:40:41 PM »
There will be a bit of velocity loss compared to longer barrels, but it won't be enough to make any real difference. Certainly not enough to try loading hotter than the factory loads, tryin' to make up for the loss. I've see identical rifles with more velocity difference than what you'll have from the standard 22" barrel.
Bold talk from a one eyed fat man.