Location: The rifle range, or archery range or behind the computer in Alaska
Re: 7mm Rem. Mag vs. .308 Winchester
You are correct in that same bullet styles and same weight 30 vs 7mm, the BC of the 7mm will always be higher than the 30 cal.
The point I was trying to make is that the 175 SMK for 30 cal is around .500 BC the 168 SMK for the 7mm is .488 BC Because of the bigger bore and therefore more gas expansion in the 30 cal you can drive the 175 some what faster out of a 300 winchester than you could a 168 grain bullet from a 7mm rem mag. Because of the burn increase in the bigger barrel and the same barrel length the 300 will be faster with heavier bullets. These cases are near identical, yet the 300 win mag would be king.
Also typically in a 30 cal rifle you dont need an 8 or 9 twist. This equals less twisting torque upon recoil.
Thanx for the support DK [img]images/icons/grin.gif[/img]
PS This is what works for me and only my personal view poin on the pros and cons of the 30 vs 7mm There is no offence meant here to 7mm fans! There are great arguments in this topic from both sides.
[ 01-17-2004: Message edited by: meichele ]
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
There might be more capacity in the 300 wm than the 7 mag, but also as Michael is saying, the 30 calibers larger bore diameter will create less pressure than a 7, when burning the same amount of powder in the same case capacity. Now add more capacity and it's even more efficient and produces higher MV yet.
Get the 300 wm, or 300 Ultra and a good brake, then you got power to drive the higher BC bullets with less wind drift and higher retained energy at LR.
The 300 Ultra with a brake don't kick as much as even a 308 does... [img]images/icons/wink.gif[/img]
Savage's have the twist adjustable ON/OFF brake, the one on my Striker works really well. The 300 Ultra is a 26" tube as well... [img]images/icons/smile.gif[/img] http://www.savagearms.com/116fsak.htm
T.Ray, If you've used both the .308Win & the 7mm Mag, there's no drama whichever one you pick for your elk [ wapiti in New Zealand ] hunting. I've used the .300WSM a lot in my mates Win mod 70 stainless and it's great for hammering pigs on the river flats,- far more emphatic than my .270Win at ranges from 200 to 400 meters.
I have only fired half a dozen rounds out of a 7mm Rem mag, for a couple of donkeys and a couple of roos, and to be honest with myself I just don't go much on calibres under .30 cal, as excellent and potent as the 7mm Rem Mag is.
I certainly will not belittle anyones choice/favourite rifle/calibre.
I'd like to see photos of different projectiles posted, as I have a lot I've recovered and will try to get them posted.
Especially from those ultra-mags at long ranges!