My post was sarcastic because of the general direction of the thread. People taking one cartridge and trying to make it into something it is not!
Lloyd-This is what I know: The 308 is not equal to the 06, if for no other reason than it will not shoot heavy bullets as well.
Sammi sets pressure limits for safety reasons,
A 280 is a fine round but will not equal a 7mm mag if loaded to sammi limits-it will not with a 100gr bullet and it will not with a 175gr bullet,
When reloading-when you see signs of pressure, you have already exceeded the safe limits.
I know that kids read this internet stuff and take it as being true, even if it is not and may attempt it.
But most of all, I know when I am reading a load of crap.
Please remember that not all of us are handicapped by SAMMI and their dreamt up limits. Some of us live under the CIP system hence we can buy ammunition loaded to the designers ideas and not what SAMMI thinks they should be.
As for my .280 AI well SAMMI really messed it up once again instead of using Ackleys design which let's face it has been about for many decades nope they had to redesign the 280 AI and actually make things dangerous. I had a heck of a problem finding out what reamer to use and what brass/dies would fit as SAMMI's will not interchange with Ackleys it appears
![Roll Eyes ::)](https://www.gboreloaded.com/forums/Smileys/default/rolleyes.gif)
and SAMMI claim they are making things safe
![Shocked :o](https://www.gboreloaded.com/forums/Smileys/default/shocked.gif)
................................ sheesh.
So far I have only fire-formed a bit of brass and the load development stage has not begun. Once I get the firearms licensing issue sorted out here I'll, hopefully
![Tongue :P](https://www.gboreloaded.com/forums/Smileys/default/tongue.gif)
, get back to it. Once I get the loads performing on target and with a suitable velocity then I'll send a batch to the proof house for pressure testing and get a report of what my loads are actually producing. This is not exactly cheap to do but I feel it will be worth it.
I have no qualms about the rifle action as after all the BSA Majestic/Monarch is a very well made action
![Cool 8)](https://www.gboreloaded.com/forums/Smileys/default/cool.gif)
and I chose the CF2 barrel as it has a larger profile over the chamber as you can see here:-
![](http://img.photobucket.com/albums/v166/Brithunter/280%20AI%20build/P2090126.jpg)
![](http://img.photobucket.com/albums/v166/Brithunter/280%20AI%20build/PA300051.jpg)
In the white before final polishing and blacking. The action and barrel were blacked separately.
This is the normal Majestic/Monarch barrel profile:-
![](http://img.photobucket.com/albums/v166/Brithunter/BSA%20Monarch%201st%20pat/P5250133.jpg)
![](http://img.photobucket.com/albums/v166/Brithunter/BSA%20Monarch%201st%20pat/P4210075.jpg)
Not the donor but the donor was the same model/year just much more worn and that too was also a .270 Win rifle.
![](http://img.photobucket.com/albums/v166/Brithunter/280%20AI%20build/PC080087.jpg)
Before fire forming (factory ammo) and a formed case from my rifle.
The aim as I said before it to produce similar velocities/performance to the old .280 Ross cartridge so 3050-3100 fps with a 140 grain bullet or close to it is the goal. The Hornady 7th edition lists loads giving 3000fps with their 139 grain bullet in the .280 Remington with a couple of powders so it should not be impossible to achieve
![Wink ;)](https://www.gboreloaded.com/forums/Smileys/default/wink.gif)
and of course this is 100 fps behind their top loads for the 7mm Rem Mag. I for one never claimed or said that my .280 AI will equal the 7mm Rem Mag if i wanted one I happen to know where there is a new actually unfinished BSA CF2 in such a chambering.
If we can find good precision in tight grouping at the same time would be very nice. I'll accept 1-1 1/2 MOA from field shooting positions.