280 AI information Blog

Get or give advice on equipment, reloading and other technical issues.

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GSells
Posts: 392
Joined: Sun Aug 13, 2017 11:04 pm

Re: 280 AI information Blog

#46 Postby GSells » Thu Dec 27, 2018 12:58 pm

Ok I’ve workes up a good 300 -600 and even 800 yds load . My barrel is worn in , so work up loads carefully. But 52.8 2209 and cci br2 of 2770 FPS. 51 gr 2209 gave me 2660 FPS.
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A good fireforming load that can be taken to a prizemeet or club event.
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GSells
Posts: 392
Joined: Sun Aug 13, 2017 11:04 pm

Re: 280 AI information Blog

#47 Postby GSells » Thu Dec 27, 2018 5:48 pm

Cop that young Harry !! Yes it’s only 5 shots but an indication sd of 1!!
From my experiences , the sd would go up by about 3 as more shots went on . 280 Ackleys can do it . And I know 2950 FPS is right in the Sweet zone at 1000 from previous testing .
I’ll take it to the 1000 yds paddock at the Melon farm ! See if I can consistently brake static shot gun clays at that distance???
I’ll keep u posted .
Ps 60.2 gr 2213 sc and cci primers and weight sorted 180 ELD’s .Pretty well much max load for reliability and case and barrel life .
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GSells
Posts: 392
Joined: Sun Aug 13, 2017 11:04 pm

Re: 280 AI information Blog

#48 Postby GSells » Mon Dec 31, 2018 3:15 pm

Ok , did testing this morning at 937 m’s . I had trigger problems which now have been fixed . Did I break any clays ? Well I was a little optimistic setting up 9 of them . The wind started out at 3 moa and finfished at 5.5 moa . But the clay I was going for was siting about 40 -50 mm high and I shot all around it ( it was scared !!) . Looking back at the video I shot , it showed good vertical . I then threw the mag speed on for 6 shots and had 2920 to 2935 FPS . If I took out the flyer of 2935 the extreme spread dropped to 7 FPS .

I then went to my 96 m range just to fine tune back up to 2945 FPS . But my v 2 magspeed finally died. I put 9 shots on trying to fix it , with 2 eronous shots both saying 2905 FPS if u believe that ? However I was pleasantly surprised at the 9 shot group ( bit of mirage too ) . Nearly got the load right , remains to be seen if it’s reliable and I really need to compete with it at the longs and earn my keep with it !!
But I am very impressed for an Ackley especially a long case too of the low ES ‘s .
Anyway that is enough for now!
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pjifl
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Joined: Fri Jun 17, 2005 12:15 pm
Location: Innisfail, Far North QLD.

Re: 280 AI information Blog

#49 Postby pjifl » Mon Dec 31, 2018 5:51 pm

If the MS has died, get yourself a LabRadar.
It is very problematical that one can expect sufficiently precise results from a MS that will be meaningful especially when working with really small SDs because the instrument error is more than that.
Also, the LR lets you truly measure 10 shot (or more) SDs during a proper shoot without any effect on the barrel vibrations. In terms of STATS, 3 and 5 shot SDs (or worse Extreme Spreads) are always very suspect.

Yes - the MS is worth having but maybe it is time to move on to something better. HINT - IT IS XMAS.........

Peter Smith.

GSells
Posts: 392
Joined: Sun Aug 13, 2017 11:04 pm

Re: 280 AI information Blog

#50 Postby GSells » Mon Dec 31, 2018 6:44 pm

pjifl wrote:If the MS has died, get yourself a LabRadar.
It is very problematical that one can expect sufficiently precise results from a MS that will be meaningful especially when working with really small SDs because the instrument error is more than that.
Also, the LR lets you truly measure 10 shot (or more) SDs during a proper shoot without any effect on the barrel vibrations. In terms of STATS, 3 and 5 shot SDs (or worse Extreme Spreads) are always very suspect.

Yes - the MS is worth having but maybe it is time to move on to something better. HINT - IT IS XMAS.........

Peter Smith.

Too late , I bought a ver 3 . I’ll save up for a lab radar , they are very good . Magspeed are good on batteries and are more portable eg flying . Both would fix the problem. Pete , thanks for your comments, I really respect your opinion. With 5 shot sd’s is merely an indication and I’ve been , told a few times by numerous people about the dangers of small samples and I know Dave Mac would be one of them . My thoery behind it is statistical in taking a sample and then proving it on target . But mainly and especially with fast 7 mm’s , I’m trying to extend barrel life as much as I can . Same as changing out barrels for the right job .
And belated Merry Christmas and a prosperous and Healthy new year to you to Pete .

Kind regards Graham . :D


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