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How does the 7MM Mag compare to the 30-06
Shootist3006
Member Posts: 4,171
Put this together for Notpars but I am sure that others will have something to add(?)
From the Hornady web pages https://gateway.hornady.com/cgi-bin/web_store.cgi?page=storehome.html&cart_id=
The 7MM will put a 139 gr. bullet out (MV) at 3250 fps and 3300 foot-pounds - not bad at all but not much of an improvement over the 30-06 150 gr. @ 3200 FPS and 3200 ft/lbs. The real difference comes with the heavier weights. The 30-06 180 gr. @ 2900 FPS and 3361 ft/lbs compares most favorably with the Winchester 175 gr. Super-X Power Point which is 2860 fps and only 3178 ft/lbs. (From the Winchester web pages http://www.winchester.com/ammunition/store/cfrlist.eye?cartlist=N21tIFJlbWluZ3RvbiBNYWdudW0=&uselist=none&brandlist=none&image=on&summary=on&velocity=on&energy=on&shortrange=on&longrange=on )
The 7MM does have a slightly better ballistic coefficient and sectional density (for identical weight bullets) but the 7MM 175 gr. BC is .427 while the 30-06 is .435. In ALL the heavier weights, the 06 is the clear winner (at least on paper). Just try and get a 7MM bullet over 175 gr. - I don't know of any other than the Barnes ROUND NOSE 195 gr.
Hope this helps in you discussions with family and friends.
Quod principi placuit legis habet vigorem.Semper Fidelis
From the Hornady web pages https://gateway.hornady.com/cgi-bin/web_store.cgi?page=storehome.html&cart_id=
The 7MM will put a 139 gr. bullet out (MV) at 3250 fps and 3300 foot-pounds - not bad at all but not much of an improvement over the 30-06 150 gr. @ 3200 FPS and 3200 ft/lbs. The real difference comes with the heavier weights. The 30-06 180 gr. @ 2900 FPS and 3361 ft/lbs compares most favorably with the Winchester 175 gr. Super-X Power Point which is 2860 fps and only 3178 ft/lbs. (From the Winchester web pages http://www.winchester.com/ammunition/store/cfrlist.eye?cartlist=N21tIFJlbWluZ3RvbiBNYWdudW0=&uselist=none&brandlist=none&image=on&summary=on&velocity=on&energy=on&shortrange=on&longrange=on )
The 7MM does have a slightly better ballistic coefficient and sectional density (for identical weight bullets) but the 7MM 175 gr. BC is .427 while the 30-06 is .435. In ALL the heavier weights, the 06 is the clear winner (at least on paper). Just try and get a 7MM bullet over 175 gr. - I don't know of any other than the Barnes ROUND NOSE 195 gr.
Hope this helps in you discussions with family and friends.
Quod principi placuit legis habet vigorem.Semper Fidelis
Comments
More realisticly tho, 150 gr in the 06 usually will get out a 22" tube at around 2900 +/-
https://gateway.hornady.com/cgi-bin/web_store.cgi?page=storehome.html&cart_id=
The BC's listed are straight from the Winchester pages cited above.
My favorite loading for the 150 gr. bullet puts it out at 3020 fps from a 22" bbl. (61 gr. W760, WW LRP, Remington brass and Sierra bullet - as with any load, reduce 10% and work up carefully!! THIS IS A MAX LOAD IN MY RIFLE (also shoots 3/4 MOA )
Quod principi placuit legis habet vigorem.Semper Fidelis
You're comparing a souped up '06 to a down-loaded 7mm.
Remember, the first few years of the 7mmRM, till about 1989, the 125 gr. went at 3310 fps. and 3040 ft/lbs.
150 gr.- 3260 fps. and 3540 ft/lbs.
175 gr.- 3020 fps. and 3406 ft/lbs.
These were factory loads. Then they were reduced to your figures, never knew why.
I still load mine close to the original loads and they seem to beat the factory '06 substantially, and that's what most shooters are using.
I.Shute
When my rifle was still chambered in 7mmRM my favorite pet load was 160 grain Sierra Boattail, 67.5 grains of Reloader22 and a Federal Magnum primer. Pro Chrony got it at 3075 fps. DO NOT DUPLICATE THIS LOAD, IT IS OVER MAX AND SHOWS SIGNS OF HIGH PRESSURE!
Now I never tried this but the Speer book claims a 175 grain bullet at 2954 using 78 grains of H870, since these books show lower than max pressure to keep idiots like me from blowing myself up these loads are reduced in the book. I feel safe to bet that with some carefull tweaking you can get that 175 grainer slighly over 3000 fps.
Since I have the gun now chambered in 7mm Ultra mag with a 28" barrel I can get the 160 bullet to 3220 fps with 100 grains of 870 Hodgden. I have no load data for the 175 grain bullet and I have not tried it yet so i cannot say what the UM will push it at. In my personal opinion the 7mm rem mag and the 7mm UM are both very reloader friendly and in order to achive the rifles full potential you need to "roll yer own".
Edited by - 7mm nut on 05/19/2002 06:11:06