Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Unconventional 338

 
LinkBack Thread Tools Display Modes
  #1  
Old 07-15-2008, 11:23 AM
Platinum Member
 
Join Date: Aug 2006
Posts: 1,302
Unconventional 338

I was thinking about what would be good for 600 and 1000 yard prone matches, and those big 338 bullets going slow still have very low wind drift. Sights have plenty of elevation, and you can always get an angled base, so scope elevation isn't a problem either.

I was thinking a 338-08 Ackley might spit out the 300 grain SMK @ 2100 fps.

What about the 338-06 Ackley? 2300 fps? Recoil would be pretty low in a heavy match rifle.

Even at 2000 fps, the 300 grain SMK beats all 22 calibers at 223 velocities, and some slower 6mm's. At 2300 fps it beats all 6mm's and 22's, and would have pretty much endless barrel life.

In a 15 lb gun your recoil is about 15 and 17 ft lbs, respectively. Is this idea feasible, or should I just get the standard 223 and be done with it? A little case with a big 300 grain bullet seated way out there might draw some attention!
Reply With Quote
  #2  
Old 07-15-2008, 11:47 AM
Platinum Member
 
Join Date: Oct 2005
Location: Michigan
Posts: 2,232
How about a 338/300WSM?

Speaking of unconventional 338's, necking the 300WSM up to 338 seems to have been successful. I don't think it would be too hard to get 2400fps with a 26" barrel (assuming proper throating for the 300 SMK). It would use a short action which is nice.

The 338-08 Ackley would be pretty hot to run 2000fps with the 300SMK.

I'd be surprised if a 338-06 Ackley would have enough case capacity to get it much over 2300, and you are talking a long action.

AJ
__________________
If some is good and more is better, then too much is just right.


My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
Reply With Quote
  #3  
Old 07-15-2008, 11:53 AM
Silver Member
 
Join Date: Dec 2007
Location: SW Texas
Posts: 283
Always full of great ideas!!

Tyler:

My understanding is muzzle brakes aren't allowed in any of the matches I've seen or heard about. Even the great shooters are bothered by recoil after 40-60 rounds. Even with a 6.5-284 recoil can be a factor in a long match. At the low velocities you are looking at, don't think you can beat the high BC 243 bullets near 3000 fps. With a muzzle brake, I think bigger, higher BC bullets would rise to the top of many long range venues.

I do think a 338 hunting bullet with a BC near 0.9 would make an interesting carry weight rifle at 338 WM speeds, say 2500 to 2600 fps for a 265 to 280 gn bullet. With a muzzle brake that won't be bad in a 8.5 lb rig. With that BC, would be a 1000 yd rig.

Keep those interesting posts coming!!!
Reply With Quote
  #4  
Old 07-15-2008, 11:55 AM
Platinum Member
 
Join Date: Aug 2006
Posts: 1,302
This would be a switch barrel rig, with another barrel in 338 Edge for long range hunting. (and different bolt head)

2400 fps would raise recoil above 20 ft lbs. I could always do stuff to lower recoil, such as mercury recoil reducers, a gra-coil buttpad, but I'm not sure how fun it would be too shoot 88 rounds through in prone.

To varminator, I was at a 600 yard match on Saturday and a guy was complaining about his 7mm-08 hurting him, but then others were shooting M1 Garands which aren't near as heavy as a match rifle and they shot very well. I heard people saying muzzle blast bothered them more than the recoil. But then again, it is about 15 lbs recoil, 50% than a 308 in the same weight gun.

Here's some ballistics in a 10 MPH wind

338 300g SMK @ 2000 fps:
600 yards 25.6 MOA drop (doesn't really matter), 4.5 MOA windage

223 80g SMK @ 2850:
600 yards 14.4 Moa drop, 5.5 MOA windage (that's hot 223 load!)

243 107g SMK @ 2850:
600 yards 13 MOA drop, 4.1 MOA windage (it wins...so far)

338 300g SMK @ 2000fps:
1000 yards 55.7 MOA drop, 8.1 MOA windage

223 80g SMK @ 2850:
1000 yards 37.7 MOA drop, 11.4 MOA windage

243 107g SMK @ 2850:
1000 yards 30.9 MOA drop, 8.1 MOA windage (dangit!)

But shoot that bullet a bit faster from a 338-06 Ackley and it wins by a good bit. The new Berger 338's have a BC a fair bit higher than the SMK's I hear...

Last edited by Tyler Kemp; 07-15-2008 at 12:13 PM.
Reply With Quote
  #5  
Old 07-15-2008, 11:55 AM
Platinum Member
 
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
It's good to see you back AJ.
Reply With Quote
  #6  
Old 07-15-2008, 12:15 PM
Platinum Member
 
Join Date: Aug 2006
Posts: 1,302
Imagine a 40 degree shoulder on it...
Reply With Quote
  #7  
Old 07-15-2008, 12:30 PM
Platinum Member
 
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
Quote:
This would be a switch barrel rig, with another barrel in 338 Edge for long range hunting. (and different bolt head)
also, don't forget about the feed rails if you were planning on a repeater.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Current Poll
Do you plan to buy a new custom rifle in the next 12 months?
YES - Of course - 73.12%
1,553 Vote
NO - wife/girlfriend won't let me. - 26.88%
571 Votes
Total Votes: 2,124
You may not vote on this poll.

All times are GMT -5. The time now is 06:34 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC