texashuntingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
nmmuledeerhunter, Dzia-Dzia, TraeMartin, Beatixre, MooseSteed
71989 Registered Users
Top Posters(All Time)
dogcatcher 110,788
bill oxner 91,416
SnakeWrangler 65,417
stxranchman 60,296
Gravytrain 46,950
RKHarm24 44,585
rifleman 44,461
Stub 43,769
Forum Statistics
Forums46
Topics537,041
Posts9,719,725
Members86,989
Most Online25,604
Feb 12th, 2024
Print Thread
Page 1 of 2 1 2
7mm-08 A.I. continues to impress. #7103979 03/07/18 05:59 PM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
My little 17" walking around rifle has a good load with 162 gr. ELD-X, at a muzzle velocity of 2640 fps on formed brass. Just because I wanted to know, I decided to work up a load with 150 gr ELD-X. I wanted to know how fast they would go out of such a short barrel, and I wanted to see if the incredible (for weight and length) BC was legit. Sunday I ladder tested them, searching for pressure. Keep in mind, standard 7mm-08 data is at your fingertips, but Ackley Improved data is not necessarily. I had to keep stepping up until I saw pressure signs on the brass. Well, I saw a node beginning, but kept going, and finally got hard bolt lift, and a shiny ring around the primer pocket, it got out of the node, so no worries, but I did find pressure.

Tuesday was time to group shoot the three charges that were in the node, and right before pressure. There was one clear winner with a vertical dispersion of 13/16" at 300 yards. I reproduced that load, and headed to the 800 yard range. I guessed at an MV of 2700 fps, and plugged that into the ballistic calculator. It center punched every steel out to 800 yards. So the BC and the MV seem to be correct. I am normally the guy that runs heavy, high BC bullets, but this lighter one, the rifle seems to like better. I checked the energy delivery out to 500 yards, and the increase in velocity looks to be delivering the same energy as the big 162's going 60 fps slower, at the muzzle.

My rental rifle is a standard 7mm-08, and it too shoots 162 A-maxes at 2640 fps MV, but it has a 3" longer barrel. wink

I found a legitimate 120 fps gain in velocity, shooting 162's out of 24" barrels, on two rifles last summer. That gain was from unformed brass, to formed brass with more powder. In my opinion it is the highest performance cartridge that will fit that action. It cheats wind like a 6.5mm, but hits much harder. Recoil is negligible, the case is just flat out efficient!


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7103996 03/07/18 06:16 PM
Joined: Dec 2011
Posts: 3,560
G
garyrapp55 Online Content
Extreme Tracker
Online Content
Extreme Tracker
G
Joined: Dec 2011
Posts: 3,560
That's great news. As soon as my mags come in, all my parts go to Chad to be delivered to the guy you recommended. I'm having 7-08AI reamed at 24" in a Bartlein 8.7 twist. I hope the results are good.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104008 03/07/18 06:29 PM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
It will be hell on wheels!


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104045 03/07/18 06:58 PM
Joined: Oct 2012
Posts: 29,576
S
Sneaky Offline
THF Celebrity
Offline
THF Celebrity
S
Joined: Oct 2012
Posts: 29,576
Love it.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104119 03/07/18 08:10 PM
Joined: Jun 2011
Posts: 33,804
B
Buzzsaw Online Content
THF Celebrity
Online Content
THF Celebrity
B
Joined: Jun 2011
Posts: 33,804
sweeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet woot


SPACE FOR RENT


Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104148 03/07/18 08:42 PM
Joined: Aug 2013
Posts: 2,030
S
spg Offline
Veteran Tracker
Offline
Veteran Tracker
S
Joined: Aug 2013
Posts: 2,030
What kind of brass are you using?

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104163 03/07/18 09:06 PM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Lapua


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104174 03/07/18 09:21 PM
Joined: Feb 2011
Posts: 6,183
M
Mike Honcho Offline
THF Trophy Hunter
Offline
THF Trophy Hunter
M
Joined: Feb 2011
Posts: 6,183
It's a dandy of a round but something about 22 cal and 6mm just gets me going.


“Two things that define an individual what you do when you have everything, and what you do when you have nothing."


Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104222 03/07/18 10:02 PM
Joined: Nov 2011
Posts: 4,541
P
patriot07 Offline
Extreme Tracker
Offline
Extreme Tracker
P
Joined: Nov 2011
Posts: 4,541
About how many grains of powder does 7-08 AI use with a 150?

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104233 03/07/18 10:14 PM
Joined: Aug 2013
Posts: 2,030
S
spg Offline
Veteran Tracker
Offline
Veteran Tracker
S
Joined: Aug 2013
Posts: 2,030
Originally Posted By: FiremanJG
Lapua


The best.

Re: 7mm-08 A.I. continues to impress. [Re: patriot07] #7104245 03/07/18 10:32 PM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Originally Posted By: patriot07
About how many grains of powder does 7-08 AI use with a 150?


Depends on what powder.

Up to 47.0 gr. nuts


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: garyrapp55] #7104278 03/07/18 10:59 PM
Joined: Jan 2011
Posts: 4,714
L
Lazyman Online Content
Extreme Tracker
Online Content
Extreme Tracker
L
Joined: Jan 2011
Posts: 4,714
Originally Posted By: garyrapp55
That's great news. As soon as my mags come in, all my parts go to Chad to be delivered to the guy you recommended. I'm having 7-08AI reamed at 24" in a Bartlein 8.7 twist. I hope the results are good.


Mine are probably going to same said guy lol...






Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104287 03/07/18 11:05 PM
Joined: Jan 2011
Posts: 4,714
L
Lazyman Online Content
Extreme Tracker
Online Content
Extreme Tracker
L
Joined: Jan 2011
Posts: 4,714
Really wanting the AI version of the -08 as well...






Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104697 03/08/18 01:21 PM
Joined: Nov 2011
Posts: 4,541
P
patriot07 Offline
Extreme Tracker
Offline
Extreme Tracker
P
Joined: Nov 2011
Posts: 4,541
Originally Posted By: FiremanJG
Originally Posted By: patriot07
About how many grains of powder does 7-08 AI use with a 150?


Depends on what powder.

Up to 47.0 gr. nuts
Just wondering in general - wanted to do a recoil calculator to compare with 6.5 CM. Surprisingly close for pushing those weights of bullets that fast out of a short barrel.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7104708 03/08/18 01:28 PM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Recoil is nothing to be concerned with for this cartridge. About the same as a standard 7mm-08, and my wife and oldest dughter have shot that one numerous times.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7106695 03/10/18 03:24 AM
Joined: Nov 2004
Posts: 2,406
R
rickt300 Offline
Veteran Tracker
Offline
Veteran Tracker
R
Joined: Nov 2004
Posts: 2,406
The 7-08 AI is how they should have introduced the 7-08 in the first place. It's the best short action round.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7106781 03/10/18 05:20 AM
Joined: Aug 2013
Posts: 2,030
S
spg Offline
Veteran Tracker
Offline
Veteran Tracker
S
Joined: Aug 2013
Posts: 2,030
I was seriously thinking of using a bartlein barrel I have in .284 and chambering it in 7-08AI but I have .284WIN already which is kind of close to the to 7-08AI at 28in of barrel. It still might happen, I look at every time I'm in my shop and contemplate about it.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7109336 03/12/18 11:58 PM
Joined: Mar 2012
Posts: 3,809
C
Cleric Offline
Extreme Tracker
Offline
Extreme Tracker
C
Joined: Mar 2012
Posts: 3,809
Why didn’t you go 7mm saw?

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7109363 03/13/18 12:27 AM
Joined: Aug 2013
Posts: 2,030
S
spg Offline
Veteran Tracker
Offline
Veteran Tracker
S
Joined: Aug 2013
Posts: 2,030
My gunsmith talked me in to it, he believes it the most inherently accurate 7mm cartridge.

Re: 7mm-08 A.I. continues to impress. [Re: Cleric] #7109417 03/13/18 01:16 AM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Originally Posted By: Cleric
Why didn’t you go 7mm saw?


Not real sure Clayton doesn't have the corner on the cartridge, and the reamer. He's got a small rifle primer, I've still got a large, and still have the same firing pin.

Same, same.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: spg] #7109419 03/13/18 01:18 AM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Originally Posted By: spg
My gunsmith talked me in to it, he believes it the most inherently accurate 7mm cartridge.


I will not argue that.

My 7 Rem Mag is very precise, but with that much powder, it takes some tuning. Today the 7mm-08 A.I. shot three inside .35" after cleaning. And that is with a button rifled Tikka barrel, that has been re-chambered.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7109503 03/13/18 02:41 AM
Joined: Aug 2013
Posts: 2,030
S
spg Offline
Veteran Tracker
Offline
Veteran Tracker
S
Joined: Aug 2013
Posts: 2,030
Originally Posted By: FiremanJG
Originally Posted By: spg
My gunsmith talked me in to it, he believes it the most inherently accurate 7mm cartridge.


I will not argue that.

My 7 Rem Mag is very precise, but with that much powder, it takes some tuning. Today the 7mm-08 A.I. shot three inside .35" after cleaning. And that is with a button rifled Tikka barrel, that has been re-chambered.


Can't complain about that, imagine it will tighten up more after you get it fouled in.
My smith and I both shoot bench rest comp with .284's and with the way mine is built its on the edge for too much recoil for bench rest shooting. I just went with a HV barrel at 28'' my smith is running straight 1.25 at 30''.

For a pure hunting setup you can't go wrong with a 7mm08AI and the barrel life is dam good too.

Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7109590 03/13/18 10:47 AM
Joined: Apr 2010
Posts: 6,219
D
dee Offline
THF Trophy Hunter
Offline
THF Trophy Hunter
D
Joined: Apr 2010
Posts: 6,219
Originally Posted By: FiremanJG
Originally Posted By: Cleric
Why didn’t you go 7mm saw?


Not real sure Clayton doesn't have the corner on the cartridge, and the reamer. He's got a small rifle primer, I've still got a large, and still have the same firing pin.

Same, same.


I run the same brass clayton runs in my 7mm-08ai. Simple nk down and fire form. The nice thing about nking 308 down is it's super easy to do the false shoulder method.


"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
Re: 7mm-08 A.I. continues to impress. [Re: J.G.] #7109605 03/13/18 11:38 AM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
I necked down some Lapua .308 and did not like what I got. The second batch of brass, I just bought 7mm-08 and fired it.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Re: 7mm-08 A.I. continues to impress. [Re: spg] #7109609 03/13/18 11:40 AM
Joined: Dec 2008
Posts: 41,085
J.G. Online Content OP
THF Celebrity
OP Online Content
THF Celebrity
Joined: Dec 2008
Posts: 41,085
Originally Posted By: spg
Originally Posted By: FiremanJG
Originally Posted By: spg
My gunsmith talked me in to it, he believes it the most inherently accurate 7mm cartridge.


I will not argue that.

My 7 Rem Mag is very precise, but with that much powder, it takes some tuning. Today the 7mm-08 A.I. shot three inside .35" after cleaning. And that is with a button rifled Tikka barrel, that has been re-chambered.


Can't complain about that, imagine it will tighten up more after you get it fouled in.


It is a 350 round barrel now. It is settled, but it is telling me it likes to be cleaned fairly often.


[Linked Image]
800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

© 2004-2024 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
Powered by UBB.threads™ PHP Forum Software 7.7.3