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Joined: Apr 2007
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Campfire Regular
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OP
Campfire Regular
Joined: Apr 2007
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Known gun, known scope, known shooter - most of the time. How would you diagnose these hunting hand loads? Where would you start the tinkering process? Seating depth, powder choice? Details of the load: 243ai 85 TSX Winchester brass CCI IMR4831- 46.5 grains
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Joined: Oct 2013
Posts: 18,927 Likes: 1
Campfire Ranger
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Campfire Ranger
Joined: Oct 2013
Posts: 18,927 Likes: 1 |
Personally I would up the powder.
The last time that bear ate a lawyer he had the runs for 33 days!
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Joined: Aug 2010
Posts: 48,090 Likes: 6
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,090 Likes: 6 |
Looks like a solid 1 3/4" group to me...
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
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Joined: Mar 2007
Posts: 20,238 Likes: 11
Campfire Ranger
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Campfire Ranger
Joined: Mar 2007
Posts: 20,238 Likes: 11 |
I wouldn't doubt that's a bedding problem.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Looks like a mechanical issue to me.
Or maybe a barrel that likes to be dirty.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Feb 2004
Posts: 5,278
Campfire Tracker
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Campfire Tracker
Joined: Feb 2004
Posts: 5,278 |
Or maybe a barrel that likes to be dirty. I'd start here.
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Joined: Aug 2010
Posts: 48,090 Likes: 6
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,090 Likes: 6 |
First off, there's no specifics on the rifle. It's only "known" to the OP. What does "known shooter most of the time" mean? A rifle is a mechanical device. If it is set up right, it's going to be a "known shooter" all the time. Providing you are using good ammo. The weak link is the nut behind the butt. Like I said, op is very vague: There's a lot to this equation the op is leaving out... Let's fill in the imaginary blanks here: 1. Rifle used: Remington 700 2. Rifle not glass bedded. Or if so, not glass bedded properly (action stressed) 3. "known scope": Leupold of some sort....Maybe Vortex? 4. Dies not set up properly. Ammo produced exhibiting high TIR. 5. Factory pressure point at forend tip..... Now let's start dissecting the load in question...... 1. How far off the lands???? 2. TIR: Runout???? 3. What "CCI" primer? 4. New brass? Once fired? 5. Is that an optimum powder for the cartridge and bullet combo? 6. Is that an optimum charge wt.??
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Apr 2007
Posts: 2,447
Campfire Regular
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OP
Campfire Regular
Joined: Apr 2007
Posts: 2,447 |
Cooper 243ai, known shooter that bugholes 87vmax Leupold VX6
Brass 1x shot and fire formed Neck sizes with Lee collett die Bullets seated with Hornady 6mm seater CCI large rifle primers IMR4831 charge chosen from 6mm Rem data. Not a max load, not a min load.
85 TSX seating depth chosen with the sharpie. Getting nice squares.
My gut says try a different propellant. Gun is a heck of a shooter, just wanted the TSX as a hunting round to compliment the 87Vmax plinking round.
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Joined: Mar 2006
Posts: 14,510
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2006
Posts: 14,510 |
Seat the TSX 0.050" off the lands and try again. Then 0.100" and 0.150". One of the above will show more promise than the others.
IMR4350 is also a good bet.
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Joined: Feb 2003
Posts: 18,854
Campfire Ranger
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Campfire Ranger
Joined: Feb 2003
Posts: 18,854 |
Is that just the cold barrel first shot? Or first shot out of a mag even if it's a second or third group?
Sent from my Dingleberry Handheld Wireless
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Joined: Nov 2009
Posts: 6,876 Likes: 2
Campfire Tracker
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Campfire Tracker
Joined: Nov 2009
Posts: 6,876 Likes: 2 |
I load for the same rifle, .243 A.I. Cooper,?? are you stuck on the 87 gr. for every thing you do?
I am having great results with 105 gr. scenar, and 41.5 gr. of IMR 4350, not a hot load.
But I don.t do much plinking just hunting, Deer, speed goats, Coyotes,and some other critters.
Just a thought, do what works for you that's what I do.Rio7
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Joined: Mar 2011
Posts: 1,863
Campfire Regular
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Campfire Regular
Joined: Mar 2011
Posts: 1,863 |
If it's the first shot of the day with a clean barrel, then stop cleaning it.
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Joined: Apr 2007
Posts: 2,447
Campfire Regular
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OP
Campfire Regular
Joined: Apr 2007
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Dirty barrel. Hasn't been touched in 50 rounds.
1st shot, cold barrel.
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Joined: Dec 2004
Posts: 5,115
Campfire Tracker
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Campfire Tracker
Joined: Dec 2004
Posts: 5,115 |
Good bed job. Play with seating depth. Play with different powders. Play with different bullets. Be happy with whatever gives you the best results and all the shooting you did in the mean time.
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." Albert Einstein
At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".
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