7mm - 08 Ackley Improved information Blog!

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watrob
Posts: 72
Joined: Thu Oct 20, 2016 3:02 pm

Re: 7mm - 08 Ackley Improved information Blog!

#136 Postby watrob » Wed Feb 15, 2017 10:35 pm

I fire-formed my first batch of 7-08ai cases from Lapua 7-08 brass (one firing so far), as mentioned in my earlier post the Lapua .308 Win Palma SR brass has coal of 2,015" and even after 8 firing the cases were still only 2.015" long (due mainly to the ai having a 40 degree shoulder angle).

The 7.08 has a trimmed length of 2.035" as cases are 2.045", I have attached a photo of the old (Win Palma on the left) & new ( Lapua 7-08 on the right) cases and you can see the case length difference, this should solve the problem of bullet expanding in the void in front of the neck case throat area, as per image above.

Because the Lapua 7-08 cases have large primer pockets I had to reduced the load by .5 of a grain and all seems ok.
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GSells
Posts: 247
Joined: Sun Aug 13, 2017 11:04 pm

Re: 7mm - 08 Ackley Improved information Blog!

#137 Postby GSells » Sat Aug 26, 2017 10:09 pm

You don't know how close this cal was nearly cut up and chambered in .284 ? Thanks to Mark F and finding me a barrel out of his stash and chamb in .284 to do dev squad with , otherwise it was going to be toast and we would never have seen how great this lil cal is !! Today after pulling the .280 Ai barrel. I quickly screwed in the lil 7/08 Ai , clean bore for 11 shot detail. 820 yds at my home range of Dalby! First shot 3 , 2 nd shot 6 . Then wacked out a 65.9 !! Edit !! 28.8.17

I can't read score cards . Was 65.5 . Still very happy !
At the Nationals I shot this in the lead up on the first day . Won 300 yds with a 60.8 and came 4 th for the day dropping 2 .
It's taken a while but have finally got it sorted .
Low recoil compared to a 280 Ai or saum . Can hold its own out to 800 yds , great barrel life and case life with .308 brass cheaper than other cals !
Great cal to consider if your a tr or f standard shooter .
Maybe a faster twist say a 8.5 or faster maybe even able to keep it out of the dead speed zone and make it able to shoot 1000 yds !

I do have go pro footage of the detail today and I'll post if people want it later on in the week !
But how close was this cal came to being thrown out !

Ps it's a bit of work to get go pro video up on utube . If you want to see it , please hit the like button above , so I know that it's worth while ?
Regards Graham.

GSells
Posts: 247
Joined: Sun Aug 13, 2017 11:04 pm

Re: 7mm - 08 Ackley Improved information Blog!

#138 Postby GSells » Thu Sep 07, 2017 9:02 pm

Ok ok !! None of y'all pressed the like button !! :shock:
Y'all holding out on me , wandering " how long is Sellsy gonna last before he post the utube vid?!!"

Well you guys s win , I give up !! I can't help myself !! I have to post uuu tuuuube !! :lol:
So here it is ,

https://youtu.be/4ulW-FrBoQo

The last one for a while , don't wanna give those pesky Kiwis any secrets =P~ .

Gyro
Posts: 349
Joined: Sat Jun 10, 2017 2:44 pm
Location: New Zealand

Re: 7mm - 08 Ackley Improved information Blog!

#139 Postby Gyro » Fri Sep 08, 2017 3:26 pm

Very mild recoil by the looks !

And much the same wind drift as say a 6.5x284. With a lot better barrel life !!

What's not to like ?

Ya gonna bring it to Trentham ?

GSells
Posts: 247
Joined: Sun Aug 13, 2017 11:04 pm

Re: 7mm - 08 Ackley Improved information Blog!

#140 Postby GSells » Fri Sep 08, 2017 9:40 pm

Gyro wrote:Very mild recoil by the looks !

And much the same wind drift as say a 6.5x284. With a lot better barrel life !!

What's not to like ?

Ya gonna bring it to Trentham ?

Hi Rob , I'll most likely be bring it to NZ and shoot it in the lead up and Queens .but a lot of water to pass under the bridge yet !!

In regards to wind drift it will keep up with a saum up to 800 yds with a good pilot behind it .
Just want to give a plug for Pseco who built the gun and chambered the 7-08 Ai .
Regards Graham.

williada
Posts: 707
Joined: Wed Jul 22, 2009 12:37 am

Re: 7mm - 08 Ackley Improved information Blog!

#141 Postby williada » Sat Sep 09, 2017 1:20 pm

Enjoying the video's Graham. Hope you enjoy NZ too.

bruce moulds
Posts: 2322
Joined: Sun Jun 19, 2005 4:07 pm

Re: 7mm - 08 Ackley Improved information Blog!

#142 Postby bruce moulds » Mon Sep 11, 2017 6:38 pm

no such thing as wind DRIFT.
the word is deflection.
keep safe,
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880
http://youtu.be/YRaRCCZjdTM

GSells
Posts: 247
Joined: Sun Aug 13, 2017 11:04 pm

Re: 7mm - 08 Ackley Improved information Blog!

#143 Postby GSells » Mon Apr 30, 2018 9:44 pm

If anyone was interested, this little cal shot well in the lead up in NZ in the shorts and got a 3rd ( short range agg. I wad clean until 600 yrs and dropped 3 at that range .)


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