Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Hunting
The Basics, Starting Out
Newbie looking for help
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="mnoland30" data-source="post: 455943" data-attributes="member: 29323"><p>The .30 calibers are great, but if you look at Berger's website note the ballistic coefficient for their bullets. The highest B.C. is for the 7mm bullets. Shooting Times did an article a few years ago on B.C. and concluded that the energy difference at 300 yards for a b.c. difference of .1 was like going up a 100 fps in velocity. The other big factor is the wind drift. In mountain canyons, the wind can be very swirly and hard to dope. A high b.c. means less wind drift at long range. </p><p></p><p>I never used to think I was recoil adverse, but I know better now. Everyone is to some extent. That's why the military uses the runt cartridge they do. The lighter the bullet the better, as long as it is effective on game. </p><p></p><p>Penetration is based on Sectional Density, and and s.d. above .280 seems to be the ticket. You get that in 7mm at about 160 gr. and at 180 gr. in .30 caliber. </p><p></p><p>You can shoot the 168 (b.c. .617) or 180 grain (b.c. .659) in 7mm or get close to the same B.C. in .30 caliber by going to the 210 gr bullet (b.c. 631). I guarantee that a 168 gr bullet will kill an elk at 500 yards. Even at the mild 2700 fps I shoot in my WSM, it has 1713 ft.lbs of energy at 500 yards. I dropped an elk almost in its tracks at 350 yds. with the 168 gr. Check out Berger's website video on long range hunts. </p><p></p><p>Do reload. I do it with a Lee hand press while I'm watching T.V. I shot factory load in my Browning and got 3 shot groups of 3", and hand load and get 1/2" groups. You can easily load 20 rounds in an hour. If you're not going to reload, the 270 WSM has a much better choice of loads, but lower b.c.</p></blockquote><p></p>
[QUOTE="mnoland30, post: 455943, member: 29323"] The .30 calibers are great, but if you look at Berger's website note the ballistic coefficient for their bullets. The highest B.C. is for the 7mm bullets. Shooting Times did an article a few years ago on B.C. and concluded that the energy difference at 300 yards for a b.c. difference of .1 was like going up a 100 fps in velocity. The other big factor is the wind drift. In mountain canyons, the wind can be very swirly and hard to dope. A high b.c. means less wind drift at long range. I never used to think I was recoil adverse, but I know better now. Everyone is to some extent. That's why the military uses the runt cartridge they do. The lighter the bullet the better, as long as it is effective on game. Penetration is based on Sectional Density, and and s.d. above .280 seems to be the ticket. You get that in 7mm at about 160 gr. and at 180 gr. in .30 caliber. You can shoot the 168 (b.c. .617) or 180 grain (b.c. .659) in 7mm or get close to the same B.C. in .30 caliber by going to the 210 gr bullet (b.c. 631). I guarantee that a 168 gr bullet will kill an elk at 500 yards. Even at the mild 2700 fps I shoot in my WSM, it has 1713 ft.lbs of energy at 500 yards. I dropped an elk almost in its tracks at 350 yds. with the 168 gr. Check out Berger's website video on long range hunts. Do reload. I do it with a Lee hand press while I'm watching T.V. I shot factory load in my Browning and got 3 shot groups of 3", and hand load and get 1/2" groups. You can easily load 20 rounds in an hour. If you're not going to reload, the 270 WSM has a much better choice of loads, but lower b.c. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
The Basics, Starting Out
Newbie looking for help
Top