Home Forums Hunting & Shooting Long Range Hunting .270 WSM vs 7 WSM

Sir,

PLEASE don't spook The Hole,as she is putting on an Expose in Imagination and Pretend. That despite my spouts behaving in like fashion. Hint.(grin)

As COAL goes,I just opened some Mail,slated to .838 BC's in .284" upon a .473" L/A. Hint.



I can hear her furiously banging the key board with her Lady Fingers from here,getting her GoogleFu on. Fortunately for her,Imagination and Pretend are free,so even she can "afford" to "contribute"...the "lucky" kchunt. Hint.

Fhuqking LAUGHING!...........

Of those, only H1000 is temperature stable. What load and COAL in the 7mm WSM gets the 180 ELD-M with H1000 over 2900 (not being smart...Hodgdon doesn't list the 180 ELD-M)?

Cartridge : 7 mm WSM
Bullet : .284, 180, Hornady ELD-M 28503
Useable Case Capaci: 71.715 grain H2O = 4.656 cm³
Cartridge O.A.L. L6: 2.990 inch = 75.95 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H1000 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.725% 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

-07.2 98 64.00 2678 2865 47829 12187 98.6 1.394
-06.5 99 64.50 2700 2914 49068 12262 98.8 1.377
-05.8 99 65.00 2722 2962 50340 12333 99.0 1.361
-05.1 100 65.50 2745 3011 51649 12401 99.2 1.345
-04.3 101 66.00 2767 3060 52995 12465 99.4 1.329
-03.6 102 66.50 2789 3110 54380 12525 99.5 1.313
-02.9 102 67.00 2812 3160 55807 12581 99.6 1.297 ! Near Maximum !
-02.2 103 67.50 2834 3210 57276 12633 99.8 1.282 ! Near Maximum !
-01.4 104 68.00 2856 3261 58790 12681 99.8 1.267 ! Near Maximum !
-00.7 105 68.50 2878 3311 60347 12725 99.9 1.252 ! Near Maximum !
+00.0 106 69.00 2901 3363 61951 12764 100.0 1.237 ! Near Maximum !
+00.7 106 69.50 2923 3414 63606 12799 100.0 1.222 ! Near Maximum !
+01.4 107 70.00 2945 3466 65312 12830 100.0 1.208 !DANGEROUS LOAD-DO NOT USE!
+02.2 108 70.50 2967 3518 67070 12858 100.0 1.193 !DANGEROUS LOAD-DO NOT USE!
+02.9 109 71.00 2989 3570 68882 12885 100.0 1.179 !DANGEROUS LOAD-DO NOT USE!
+03.6 109 71.50 3010 3622 70754 12912 100.0 1.165 !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 106 69.00 3025 3659 75900 12207 100.0 1.141 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 69.00 2714 2944 49921 12803 96.0 1.361

Viht 568 looks good as well. Temp stable as well. Plus it is available as well.

Cartridge : 7 mm WSM
Bullet : .284, 180, Hornady ELD-M 28503
Useable Case Capaci: 71.715 grain H2O = 4.656 cm³
Cartridge O.A.L. L6: 2.990 inch = 75.95 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N568 *C*T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.694% 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

-06.9 97 67.00 2713 2941 47338 13376 96.8 1.423
-06.2 98 67.50 2735 2991 48555 13473 97.1 1.406
-05.6 99 68.00 2758 3041 49807 13567 97.4 1.389
-04.9 99 68.50 2781 3091 51095 13658 97.7 1.373
-04.2 100 69.00 2804 3142 52417 13745 98.0 1.357
-03.5 101 69.50 2826 3193 53771 13830 98.2 1.341
-02.8 101 70.00 2849 3244 55158 13910 98.5 1.325
-02.1 102 70.50 2872 3296 56580 13987 98.7 1.310 ! Near Maximum !
-01.4 103 71.00 2895 3349 58041 14061 98.9 1.294 ! Near Maximum !
-00.7 104 71.50 2917 3401 59542 14131 99.1 1.279 ! Near Maximum !
+00.0 104 72.00 2940 3455 61084 14197 99.2 1.264 ! Near Maximum !
+00.7 105 72.50 2963 3508 62669 14259 99.4 1.250 ! Near Maximum !
+01.4 106 73.00 2985 3562 64299 14317 99.5 1.235 !DANGEROUS LOAD-DO NOT USE!
+02.1 107 73.50 3008 3616 65974 14371 99.6 1.221 !DANGEROUS LOAD-DO NOT USE!
+02.8 107 74.00 3030 3670 67696 14421 99.7 1.206 !DANGEROUS LOAD-DO NOT USE!
+03.5 108 74.50 3053 3725 69467 14467 99.8 1.192 !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 72.00 3092 3821 75822 13666 100.0 1.156 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 72.00 2724 2966 47484 13849 93.1 1.408

You boys are gonna wear her GoogleFu out! Hint!



Fortunately for her,Imagination and Pretend are free,so even she can "afford" to "contribute"...the "lucky" kchunt. Hint.

Wonder what my weather is doing currently?!? Hint.

Fhuqking LAUGHING!..............

With 66.5 grains of H1000, velocity is calculated at 2789 fps which is below 2800 fps, 67 grains is near maximum at 2812, which is about as high as you would want to go. So with H1000, which is temperature stable, the .270 WSM with 150 SB shoots flatter and has less wind-drift according to those figures.

Not sure what you're looking at, but for me, I'd be looking at working up to 69.5/70 grains of the stuff, watching the chronograph for 2900+. Have a feeling all would be fine. Even at that load, you're not exactly standing on its neck. I don't even know that I'd fire more than one shot at 67 grains just to check everything over before working up.

2900 with a 175/180 has never been any big trick in the 7 WSM, or at least the few I've owned.

26 is like cheating with the WSM.

Seen it,Done it,Live it and LOVE it. Hint.(grin)

Fortunately for her,Imagination and Pretend are free,so even she can "afford" to "contribute"...the "lucky" kchunt. Hint.

Fhuqking LAUGHING!..............

Reloder 26 also increases velocities in the .270 WSM, by a similar margin as what it does in the 7mm WSM. Therefore, the 3100 fps in the .270 WSM would need to be increased if using Reloder 26 in the comparison.

Yes for sure.

What rifle are you shooting the Super Bulldozers out of? Have you ran any up to speed yet in your 270 WSM?

I previously mentioned in this thread that I'm running the 140 Bergers at 3250 with 71 grains Retumbo. Remington 700 SA.

The Super Bulldozers wouldn't shoot in your rifle?

Just shooting out the 10 twist before the 8 twist gets attached. But I would run the 140's SB rather than the 150 SB's to get a flatter trajectory for less than 500 yards. 140's are optimal in a .270 or .270 WSM IMO.

She's simply Pretending aloud,with her GoogleFu. Hint..............

Little Stick, there is no pretending by me at all, the exercise with the analysis of the 270 WSM with high bc 140 or 150 bullets is to demonstrate that your beloved 180 ELD-M -(your quote: "The 270 Whizzum,can't begin to touch the 7 Whizzum,as the .796 BC 180 ELD is simply magnificent") in a 7mm WSM isn't significantly better ballistically than the .270 WSM with bullets that actually exist. In fact, the .270 WSM has a flatter trajectory and wind-drift is better with the .270 WSM if you only achieve 2800 fps in the 7mm WSM and only marginally behind if you can achieve 2900 fps, with temperature stable powders.

However, as you mention "pretending", how do you manage to shoot all the rifles you have, with all the different projectiles you have, when hunting, given that you have a high propensity to take photos and display same on this forum, yet you don't seem to have a huge number of photos of game taken with each of those rifles and projectiles? Could it be that you don't actually hunt with them to any significant extent, and that you are the one who is pretending?

Big Stick, Beretzs, Jordan, Riflehunter, Rex - thanks for entering the fray. As the OP I'm happy to read all of your comments. The more data points, the better.

A guy makes his own "luck" and a Skookum Rifle launching 180 ELD's,connects all dots by default. 1-8" is a forgiving place to be,whether 7-08,7-08AI,284 Win,Whizzum,280,280AI or 7mm RemMag,if only because I shoot them all(I'm done with ShamWow's and STW's). Hint.

It's never been difficult to discern who shoots and who Pretends. Hint.(grin)

I haven't scored a new Tikka stock,since this morning,when The 'Horn snuck up on me and dropped it off on the sly. It's a CTR for my 224 Speedmire and my greatest reservations in your project,are those fhuqking schitty Tikka mags and bottom "metal",which aren't CTR or AICS(I shoot both). Hint................

Fortymile, you're welcome. I do wish to apologize on behalf of Little Stick for him being a pretending, misleading, lying piece of dog schidt. It saddens me deeply that he is that way.

Pardon wares that exist,while others extoll their very WELL founded Insecurities. Hint.



Feed/function matters,more than a "smidge". Hint...............

That looks like fun! What do you think of those LA 3-round mags?