- Thread starter
- #21
Thinking about changing up my 7mag...
- Thread starter desertcj
- Start date
TackDriver284
Handloader
- Feb 13, 2016
- 2,572
- 2,175
desertcj, sorry for the delay. I was not able to figure out how to create a bullet file, but someone on another forum gave me some tips. So I am sure I got it now, but I don't have the H20 case fill, but this is a rough estimate with the 26 and 28 inch barrel.
Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 180, ELDM
Useable Case Capaci: 73.636 grain H2O = 4.781 cm³
Cartridge O.A.L. L6: 3.500 inch = 88.90 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H1000
Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 180, ELDM
Useable Case Capaci: 73.636 grain H2O = 4.781 cm³
Cartridge O.A.L. L6: 3.500 inch = 88.90 mm
Barrel Length : 28.0 inch = 711.2 mm
Powder : Hodgdon H1000
Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 180, ELDM
Useable Case Capaci: 73.636 grain H2O = 4.781 cm³
Cartridge O.A.L. L6: 3.500 inch = 88.90 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H1000
Code:
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 83 56.00 2319 2149 29905 9862 92.6 1.792
-18.0 85 57.40 2381 2265 32035 10175 93.9 1.742
-16.0 88 58.80 2443 2385 34322 10472 95.1 1.688
-14.0 90 60.20 2505 2508 36780 10750 96.2 1.632
-12.0 92 61.60 2567 2634 39425 11007 97.2 1.579
-10.0 94 63.00 2629 2763 42272 11242 98.0 1.527
-08.0 96 64.40 2691 2895 45341 11452 98.7 1.477
-06.0 98 65.80 2753 3030 48650 11637 99.2 1.429
-04.0 100 67.20 2815 3167 52225 11795 99.6 1.383 ! Near Maximum !
-02.0 102 68.60 2876 3306 56093 11924 99.9 1.339 ! Near Maximum !
+00.0 104 70.00 2937 3447 60282 12022 100.0 1.296 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 71.40 2997 3590 64826 12098 100.0 1.255 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 72.80 3057 3735 69764 12168 100.0 1.215 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 74.20 3117 3882 75139 12233 100.0 1.176 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 75.60 3176 4031 81003 12292 100.0 1.139 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 77.00 3235 4182 87415 12346 100.0 1.103 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 104 70.00 3060 3742 73947 11496 100.0 1.196 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 70.00 2751 3026 48472 12139 96.5 1.427Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 180, ELDM
Useable Case Capaci: 73.636 grain H2O = 4.781 cm³
Cartridge O.A.L. L6: 3.500 inch = 88.90 mm
Barrel Length : 28.0 inch = 711.2 mm
Powder : Hodgdon H1000
Code:
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 83 56.00 2371 2247 29905 9151 93.6 1.863
-18.0 85 57.40 2433 2366 32035 9425 94.9 1.811
-16.0 88 58.80 2495 2489 34322 9683 96.0 1.755
-14.0 90 60.20 2558 2615 36780 9922 97.0 1.698
-12.0 92 61.60 2620 2743 39425 10142 97.8 1.643
-10.0 94 63.00 2682 2875 42272 10340 98.5 1.590
-08.0 96 64.40 2744 3009 45341 10514 99.1 1.539
-06.0 98 65.80 2805 3146 48650 10664 99.5 1.489
-04.0 100 67.20 2867 3284 52225 10789 99.8 1.442 ! Near Maximum !
-02.0 102 68.60 2927 3425 56093 10887 100.0 1.396 ! Near Maximum !
+00.0 104 70.00 2987 3567 60282 10960 100.0 1.352 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 71.40 3047 3711 64826 11026 100.0 1.310 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 72.80 3106 3857 69764 11088 100.0 1.269 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 74.20 3165 4004 75139 11144 100.0 1.229 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 75.60 3224 4153 81003 11196 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 77.00 3282 4305 87415 11243 100.0 1.154 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 104 70.00 3106 3857 73947 10479 100.0 1.250 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 70.00 2806 3147 48472 11181 97.2 1.487- Thread starter
- #24
- Thread starter
- #25
I've got all the parts on order. Went with a 26" Shilen stainless match, Savage varmint contour. 1 in 8 twist, 4 groove ratchet rifling. Going to have the barrel and all the other metal parts nitrided. Why not? Probably won't get it all put together until around January I'm thinking.
TackDriver284
Handloader
- Feb 13, 2016
- 2,572
- 2,175
desertcj":l3a7sn29 said:
Look forward to hear results once its built, great project there.
- Thread starter
- #27
- Thread starter
- #28
- Thread starter
- #30
It is an 8 twist with the correct contour and threaded for a brake. I'm going to just keep it. It's a little disappointing, but mistakes happen and they did offer to replace it. I'm going to continue with the build. Need to contour and clock the brake, true the action face, lap the bolt lugs and then it's all getting nitrided after firing a few rounds to smooth out any burs before the nitride.
longrangehunter
Handloader
- Jun 19, 2011
- 1,483
- 7
Shilen has a history with me, and mistakes. That said I do like the 4 groove ratchet design, and it shoots lights out in my 6.5/300 WSM, and yet I understand not wanting to wait around for another barrel to show up.
- Thread starter
- #32
Just sitting here kinda bored and reading through a couple hundred pages of posts here...lol. I got this rifle built, but I don't have a decent scope for it yet. Still need some brass as well. Those 180gr Eld-m's are still on the top of the list for this one but I've been doing a lot of reading and wondering what could be done with this 26" barrel, long throat(3.450"), H1000 or RL26 and some 140gr or 150gr E-tips? I have to use copper to hunt with in my state! Am I crazy to think that 3400fps could be possible with the 140gr E-tip and 3300fps with the 150gr version?
desertcj":wf7jw6vy said:
That sounds pretty fast. I'd think more along the lines of 3300 with the 140's and maybe 3150-3200 top end with the 150's. My 7mm Mashburn with a 25" barrel will nip at 3400 with a 140 and 3500's and change with 132 BBC's and Speers. I do think you could get some great speed out of them both, just not sure you'd safely reach the marks you put there.
- Thread starter
- #34
You could be right? Pretty sure that I've seen factory ammo that is rated 3250fps for 140s and 3150fps for 150s though. I was thinking that the longer OAL available with my throating would up that a little and of course the 26" barrel isn't going to hurt. Im also not afraid of the 65,000psi zone. For what it's worth, I did fire the rifle once to confirm function and the brake makes an amazing difference. Thing kicks less than my .243 now!
desertcj":vbftqhlx said:
That is sorta what I was thinking I guess. You may gain a 100 FPS over the factory speeds. I get about 3300 with the 140 Partitions in my little 7 WSM, so I can see you gaining a bit over that. Either way, once you get up over the 3200 mark with either bullet you are trucking. I wouldn't be too scared of trying the Barnes 168 LRX's either. Those might just have some great BC and give you the best of both worlds. All depends on what you are trying to kill though I guess.
- Thread starter
- #36
In California, deer and maybe black bear? I'm probably going after elk next year, but I'm taking a bow. On the 168gr LRX, it is a contender for my copper load. Truth is, a 140 E-tip at 3400fps, 150 E-tip at 3300fps and the 168 LRX at 3200fps are all at close to 2100fps at 750yards. The LRX has a slight advantage in wind drift. 2" less at 750yds.
desertcj":ddy0vo97 said:
Those are all pretty danged quick speeds from the 7 RM, but you never know I guess till you try them. I'd imagine any of them run that quick would be wicked on any deer or black bear or elk you encounter. I have a bunch of the LRX's sitting on the shelf, just haven't done much with them yet. Looking forward to seeing how your new rifle shoots. What are you planning to put on top of it for optics?
- Thread starter
- #38
Yes, I have lofty goals for it. May as well see what it can do! Within reason of course, but most 7mm rem mag load data is pathetically weak these days. I am thinking about trying an Athlon Midas TAC 6-24x50 for the scope. I was also considering a Burris Veracity 4-20x50 but I like the turrets and reticle on the Athlon more than the Burris. I suppose I can throw up a picture sans scope...
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Hey man, I am totally with you. I like to run my stuff "up there" as well. I did it for years with a few 7 RM's and that is kinda what pushed me into the Mashburn. I still love the plain old 7 Rem though. Just about the best there is in my opionion for a general purpose hunting rifle that can do anything without a bunch of messing around.
What twist is the barrel on it? I think I remembered you saying it was an 8?
Looks great though. Can't wait to see what it does on paper. Looks pretty good just sitting still though!
What twist is the barrel on it? I think I remembered you saying it was an 8?
Looks great though. Can't wait to see what it does on paper. Looks pretty good just sitting still though!
- Thread starter
- #40
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