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Joined: Jun 2011
Posts: 965
Campfire Regular
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OP
Campfire Regular
Joined: Jun 2011
Posts: 965 |
I'm working up some new loads for my Tikka T3 7mm rem mag, 140gr Nosler Accubond. Hogdon site lists 59gr max. I am finding tons of info showing 66-67 grains as max with a velocity in the 3200 range. I have a pile of H4350 for my 300 wsm so I'm hoping it will get me to an accurate 3200 ish from my 7.
Who's running H4350 and 140 accubonds? Yes, I have a chronograph. No, I do not believe everything I hear on the internet!
Thanks fellas.
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Joined: Apr 2013
Posts: 285
Campfire Member
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Campfire Member
Joined: Apr 2013
Posts: 285 |
I'm running my 7mm with 4350 and 139 sst Molly and man the accuracy is amazing but I'm having a hard time getting them over 3000 on the crono and holding the accuracy at 3100 they tend to open up to about 1 1 1/2 and I'm running 60.5 grains seated just off at 2980 average shots darn well
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Joined: Feb 2004
Posts: 2,244
Campfire Regular
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Campfire Regular
Joined: Feb 2004
Posts: 2,244 |
I'm loading 62.5 grains of IMR4350 with 150 NBT's for a good friend...
No chrono but he drills deer and critters...YMMV...
Start lower and work up!
"Hunting, fishing, roping, working, sleeping, eating. Not always in that order."
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Joined: Jul 2006
Posts: 2,736
Campfire Regular
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Campfire Regular
Joined: Jul 2006
Posts: 2,736 |
take a look at Noslers on line reloading guide. They don't show H4350, but do list IMR4350. Can be a good choice with lighter bullets.
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Joined: Nov 2011
Posts: 30,938
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2011
Posts: 30,938 |
Are you sure you are on the right page. 59gr sounds about right for a .280 AI. Here's the QL simulation: Cartridge : 7 mm Rem. Mag.
Bullet : .284, 140, Nosler AccuBond 59992
Useable Case Capaci: 74.204 grain H2O = 4.818 cm�
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H4350
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.794% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-07.9 87 58.00 2906 2626 46024 10145 97.8 1.341
-07.1 87 58.50 2929 2666 47103 10222 98.1 1.327
-06.3 88 59.00 2951 2707 48205 10296 98.3 1.312
-05.6 89 59.50 2974 2749 49332 10368 98.5 1.298
-04.8 90 60.00 2996 2790 50483 10438 98.7 1.284
-04.0 90 60.50 3018 2832 51660 10506 98.9 1.271
-03.2 91 61.00 3040 2874 52863 10571 99.0 1.257
-02.4 92 61.50 3063 2916 54092 10635 99.2 1.244 ! Near Maximum !
-01.6 93 62.00 3085 2958 55349 10696 99.3 1.231 ! Near Maximum !
-00.8 93 62.50 3107 3000 56633 10754 99.4 1.218 ! Near Maximum !
+00.0 94 63.00 3129 3043 57947 10811 99.6 1.206 ! Near Maximum !
+00.8 95 63.50 3151 3086 59290 10865 99.7 1.193 ! Near Maximum !
+01.6 96 64.00 3172 3128 60662 10916 99.7 1.181 ! Near Maximum !
+02.4 96 64.50 3194 3171 62066 10966 99.8 1.169 !DANGEROUS LOAD-DO NOT USE!
+03.2 97 65.00 3216 3215 63502 11012 99.9 1.157 !DANGEROUS LOAD-DO NOT USE!
+04.0 98 65.50 3237 3258 64970 11056 99.9 1.145 !DANGEROUS LOAD-DO NOT USE!
Results caused by � 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 94 63.00 3168 3119 60803 10738 99.9 1.180 ! Near Maximum !
Data for burning rate decreased by 3% relative to nominal value:
-Ba 94 63.00 3085 2959 55096 10837 98.8 1.233 ! Near Maximum !
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Joined: Feb 2011
Posts: 17,767
Campfire Ranger
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Campfire Ranger
Joined: Feb 2011
Posts: 17,767 |
My hunting pal is a 7mm Mag. man.. He has a couple favorite loads, but with I4350.. 140 BTBT and 120 BTBT.. The first for deer and elk, the second for antelope and coyotes.. I won't give the exact load, but it is a grain or two over max.. He has been shooting this for 20 plus years..
Just for your info.. My old 7mm Rem. Mag. was good with 140's and I4350, but really shines with Re22..3300+ fps... It was sure death on deer and antelope and a couple elk.. My wife took it 15 or 20 years ago for "her" rifle...
Molon Labe
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Joined: Jun 2011
Posts: 965
Campfire Regular
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OP
Campfire Regular
Joined: Jun 2011
Posts: 965 |
thanks fellas. I am definitely looking in the right area, though it doesn't appear this is my best bet to get into the 3,200 range. I have shot RL 22 but after testing it this winter, I was not impressed at the velocities at 30 degrees and less. Maybe I should try H4831 or H1000?
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Joined: Mar 2001
Posts: 18,881
Campfire Ranger
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Campfire Ranger
Joined: Mar 2001
Posts: 18,881 |
Unfortunately, 7mm Remington magnums have varied alot over the years as to throat specs., etc. When it came out, a much used load was 66 grs. of IMR 4350 with a 140 gr. bullet. I loaded that with both the 140 Nosler Partitions of that time, and the 140 gr. Sierra bullet. In my early Remington 700, 68 grs. was a bit too hot. The 66 gr. load made my first 300 yd. kill for me.
Most of the rifles of that day would clock about 3270 fps with that load.
Later alot of rifles were found to have shorter throats and didn't take as much powder. And the factory loads were reduced as the cartriage was known to produce pressure spikes for no apparent reason.
So, my advice is work up slowly and test your loads on a hot day with 5% more powder to see if they produce pressure signs.
BTW, that round often shoots quite well when loaded at the milder pressure levels with the slower powders. E
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Joined: Aug 2005
Posts: 28,234
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 28,234 |
This may not be relevant, but when I think of 140 gr bullets for my 7mags, I immediately reach for RL22, up to 69gr's worth.
It is irrelevant what you think. What matters is the TRUTH.
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Joined: Oct 2009
Posts: 1,742
Campfire Regular
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Campfire Regular
Joined: Oct 2009
Posts: 1,742 |
H-S precision rifles are tested with H4350 and guarantee sub .5MOA. My test target used 64.0 H4350/ 150 Nosler BT/ Win. brass and Rem 9 1.2 magnum. COL 3.290". This is a hot load but just goes to show how feeble book loads are for the 7mmRM.
I've never used H4350 with 140's so I can't help there.
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Joined: Jan 2011
Posts: 33
Campfire Greenhorn
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Campfire Greenhorn
Joined: Jan 2011
Posts: 33 |
Is anyone shooting the Hornady 154 gr. SST with H4350?
Hookman
A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
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Joined: Jun 2011
Posts: 965
Campfire Regular
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OP
Campfire Regular
Joined: Jun 2011
Posts: 965 |
Thanks for the info guys. Maybe a better question would have been " what powder will be temp stable and allow me to run 140 grain bullets into the 3250 range?"
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