7mm-08 AI Reloading Data

arthursc · Rookie Member Joined: Oct 04, 2010 Posts: 2

Hi,

I am about to start reloading my 7mm-08 AI. I have some questions regarding this that I would like some input on.

I need to know what I should trim the cases down to as I have 40 degree AI.

I know the loads as I have this data but I have no data on "trim to length".

I am using;
Fed Cases (7mm-08)
VV N140 Powder
Nosler 140 Ballistic Tips
CCI Benchmark Primers

Rifle is Sako 75 with worther 19" Barrel with 9/14 twist.

If anyone has some data I would really like to know.

Regards
Colin.

Pizzaguy · Member Joined: Oct 03, 2010 Posts: 34 Location: Oklahoma

Here is some load data for the 7MM-08, the AI is just a varient of the same case, i'm looking for the case data now.

www.accuratereloading....08rem.html

Pizzaguy · Member Joined: Oct 03, 2010 Posts: 34 Location: Oklahoma

Normaly AI's chambers are 0.004 shorter in headspace so your trim length would be that much less. THIS IS A GUESS as I am still looking for the reloading data. It's not in any of the normal spots.

Pizzaguy · Member Joined: Oct 03, 2010 Posts: 34 Location: Oklahoma

Most are saying 1 to 2 grains more than max 7MM-08 loads...

Pizzaguy · Member Joined: Oct 03, 2010 Posts: 34 Location: Oklahoma

I found this page ammoguide.com/cgi-bin/...&catid=644 and it says the case trim length is 2.035 it wants me to join for free to see more data, I did the leg work, it's up to you know Wink

Pizzaguy · Member Joined: Oct 03, 2010 Posts: 34 Location: Oklahoma

And I found your exact post on another forum, I hope I didn't just waste my time on a bot, if your not a bot good luck with your loading!!! let me see the results.

arthursc · Rookie Member Joined: Oct 04, 2010 Posts: 2

Pizzaguy wrote:

And I found your exact post on another forum, I hope I didn't just waste my time on a bot, if your not a bot good luck with your loading!!! let me see the results.

Hi Your correct i'm no bot. I did post the exact same content on a site in the UK I use as I know some people there have 7mm-08 AI but no postings yet.

Thanks for the leg work.

Regards
Colin.

Vince · Posted: Mon Oct 04, 2010 8:33 pm Post subject: Re: 7mm-08 AI Reloading Data

Welcome aboard Colin...grab a beer and pull up a stump mate.

Good work on finding the necessary data Pizza...well done mate.

Cheers, Vince

PaulS · Posted: Mon Oct 04, 2010 11:37 pm Post subject: Re: 7mm-08 AI Reloading Data

Since the 7MM - 08 used to be (and still is in some cases) a wild-cat you should make a chamber casting to find out where to trim the cases. Unless you know your gun was factory made in the 7MM 08 caliber take the the time to make the chamber casting.

steve4102 · Member Joined: Feb 24, 2005 Posts: 38

The best way to determine Trim-to Length for any rifle especially a Semi-Wildcat like the 7MM-08 AI is with a Sinclair Chamber Length Gauge. They cost $7 and will tell you exactly what your Max case length will be. Then just subtract .010 and you have your Trim-to Length.

www.sinclairintl.com/...._Gage_7_mm

chambered221 · Posted: Wed Oct 06, 2010 4:51 pm Post subject: Re: 7mm-08 AI Reloading Data

Pizzaguy wrote:

Here is some load data for the 7MM-08, the AI is just a varient of the same case, i'm looking for the case data now.

www.accuratereloading....08rem.html

I strongly recommend not using any of the starting loads listed on the link posted !!!
I've crossed referenced some data of calibers I'm familiar with and re-load for. Some of their starting loads are actually max loads in some re-loading manuals.

These loads might be ok for the rifles they were testing in but I recommend seeking other commercial data to start with.

Just as an example; My 7mm08 maxed out at 44.0gr of Varget with a 120gr Nosler BT. I've talked with others that found max to be in the 44.0-44.5gr. range as well.
Nosler and Hodgdon both put the max at 45.0gr.
The data in that link started at 44.0gr and went up from there !!!

I have used that Sinclair tool.........works great !!!

steve4102 · Member Joined: Feb 24, 2005 Posts: 38

Quote::

The data in that link started at 44.0gr and went up from there !!!

The data in the link is for the 7mm-08, the OP is referring to the 7mm-08 AI (Ackley Improved) Starting at Max 7MM-08 data and working up is the way it is done for the Ackley.

chambered221 · Posted: Thu Oct 07, 2010 4:41 pm Post subject: Re: 7mm-08 AI Reloading Data

I understand what the OP needs are, I was just concerned about someone using that data in a standard cartridge.