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November 22, 2008, 11:06 PM | #1 |
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Help guessing at a velocity for 44 Mag hunting load
I just rolled a box of deer ammo.
- Hornady 240 gr. JHP XTP - 24.0 gr. of H110 - Winchester WLP primers - Good crimp at the cannelure, OAL came out to 1.610", per the book. - It will be shot out of a 7-1/2" Redhawk barrel The Lyman book has 23.5 gr. of H110 at 1196 fps, and 24.5 at 1233 fps. They shot it out of a Universal Receiver w/ 4" barrel. Theirs will have a better gas seal, but I've got almost twice as much barrel in which to build pressure. I bet this is a pretty common magnum load, and I'm hoping someone here has chronographed it or something very close to it, so I can make a good guess about trajectory. Thanks!
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November 22, 2008, 11:40 PM | #2 |
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Smaug,
I would guess that 24/H110/240 JHP would give you 1450-1500 fps from a 7.5" barrel Redhawk. When comparing my loads, note that W296 and H110 are acknowledged to be the same powder marketed by two different companies. My closest loads from 6.5" barrel S&W M629 Classic thru Oehler chrono: 23 gr/W296/240 gr Nosler JHP = 1350 fps 24 gr/W296/250 gr cast SWC = 1425 fps
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November 23, 2008, 12:16 AM | #3 |
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The sierra manual shows a 7.5" Blackhawk firearm and 24.2 grs H110 gets 1400'ps with a 240 gr bullet. The bearing surface will be close to the XTP and speeds will be close.
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November 23, 2008, 01:21 AM | #4 |
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Empirical data always beat calculated predictions. A well thought out (in advance) range session or two will give you a working knowledge of the bullet's trajectory from your gun. Shoot a group or three at a convenient near distance and a few more at a greater range, I'd go for 25 and 100 yards, then take your results into a ballistics program (on line, I like the Norma website with its sliders and define your own bullet function.) The range data will tell you how to hold for the range of a given shot, the ballistics program will give you an estimate of your muzzle velocity (sort of a field expedient chronograph.)
The Oehler Ballistic Explorer's Ammo Library lists the Hornady 240 grain XTP, catalog # 44200, as having a ballistic coefficient of 0.205. Using velocities taken from the Hornady website, the Ballistic Explorer calculates 0.207
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Gee, I'd love to see your data! |
November 23, 2008, 02:25 AM | #5 |
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Smaug -I have shot that exact load [except for the primer, cci 350] from my S&W 29-5 w/ 6"bbl. and I registered 1310 fps @ 15", on my Oehler 35P.
For what it's worth, Hodgden and most other sources recommend magnum pistol primers for use with ball powders like H-110 & 296 since they are harder to ignite. You will also get more consistant velocities, and lower extreme spreads. That last statement is according to them and verified by me. |
November 23, 2008, 09:19 AM | #6 |
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For what it's worth, QuickLOAD predicts a velocity of 1440 fps using your data.
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November 23, 2008, 10:27 AM | #7 |
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Thanks fellas
I found this great ballistics calculator. It is super fast and super simple. Thought you might enjoy it.
http://www.handloads.com/calc/ Looks like a 50 yard zero would also be zero at 30 yards. Seems pretty ideal for handgun deer to me. What do you think?
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November 23, 2008, 11:37 AM | #8 |
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Why can't you accept it for what you bought it for? I jacked up the loads enough to splt a cylinder on a Ruger Super Blackhawk. The gunsmith produced a few S&W's with the cylinder and topstrap blown out (S&W's weak point is to the rear) so you get to eat everything.
Want a larger round, buy it!
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