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
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Re-barreling one of my .308's - Twist rate?
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="Mike6158" data-source="post: 1385131" data-attributes="member: 1039"><p>Thanks for the link. That's very handy. The Lapua FMJBT has a G7 BC of .211 and it's 1.333" long. The calculator says, for 800 - 1050 fps it's marginally stable at 12, stable at 10 and faster. Lapua must've ate their Wheaties when they designed the bullet.</p><p></p><p>I've been playing around in the calculator with lots of bullet combos (Barnes TTSX, Berger Hunting, etc) the 1:8 will definitely put the bullet I'd want to use on the high end of stable between 800 and 1050 fps. So will a 1:9. The reality is, for subsonic ammo, you don't want to use a bullet lighter than 185gr. There's not a lot of energy in a 200 gr bullet and going lighter isn't going to help. Especially with a big ole hog. </p><p></p><p>Here's a point blank range curve for the 200 gr FMJBT at 100 yards. It looks like someone threw a hand grenade <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p><img src="http://wildlightimagingstudio.com/img/s3/v42/p2703534035-5.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Yes, specialized. The rig will be for hogs at night. I'll put my Night Optics thermal imaging scope on it (specialization #1) and I plan to suppress it (specialization #2). Max yardage will be up to but less than 200 (for coyotes) and that may be a stretch for the optics and safety.</p><p></p><p>I have a 700 Tactical in .308 and I never shoot the VTR so modifying the VTR won't hurt my feelings any. </p><p></p><p>Neither rifle is my go to rifle for long range. I have my .338 Edge for long range and my .20 Beggs for intermediate range smaller game. I also have a .223 Tactical but I moved the Nightforce from it to the .20 and I haven't replaced the scope yet. </p><p></p><p>On a side note- at 900fps... the sound without a suppressor is pretty impressive...</p></blockquote><p></p>
[QUOTE="Mike6158, post: 1385131, member: 1039"] Thanks for the link. That's very handy. The Lapua FMJBT has a G7 BC of .211 and it's 1.333" long. The calculator says, for 800 - 1050 fps it's marginally stable at 12, stable at 10 and faster. Lapua must've ate their Wheaties when they designed the bullet. I've been playing around in the calculator with lots of bullet combos (Barnes TTSX, Berger Hunting, etc) the 1:8 will definitely put the bullet I'd want to use on the high end of stable between 800 and 1050 fps. So will a 1:9. The reality is, for subsonic ammo, you don't want to use a bullet lighter than 185gr. There's not a lot of energy in a 200 gr bullet and going lighter isn't going to help. Especially with a big ole hog. Here's a point blank range curve for the 200 gr FMJBT at 100 yards. It looks like someone threw a hand grenade :D [IMG]http://wildlightimagingstudio.com/img/s3/v42/p2703534035-5.jpg[/IMG] Yes, specialized. The rig will be for hogs at night. I'll put my Night Optics thermal imaging scope on it (specialization #1) and I plan to suppress it (specialization #2). Max yardage will be up to but less than 200 (for coyotes) and that may be a stretch for the optics and safety. I have a 700 Tactical in .308 and I never shoot the VTR so modifying the VTR won't hurt my feelings any. Neither rifle is my go to rifle for long range. I have my .338 Edge for long range and my .20 Beggs for intermediate range smaller game. I also have a .223 Tactical but I moved the Nightforce from it to the .20 and I haven't replaced the scope yet. On a side note- at 900fps... the sound without a suppressor is pretty impressive... [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Re-barreling one of my .308's - Twist rate?
Top