Thread: 6.5 PRC Load Development Begins

I've started to run low on Re26 and have gotten frustrated with erratic behaviour from it at times anyway, so just switched to AR2225...



Both the last groups come in at 0.290" and 59.2gr was a mild 2980 with good ES/SD.

Interesting what was your 26 speed and charge? I was under the impression it’d be no good because iv being told no good in saum good to see some real world

Right around the Hornady "max" for similar speed.

@Pommy they are some great groups there.

It's non existent. But less non existent than Re26. Quite a bit arrived in the last ADI shipment and took a couple of weeks to get snapped up.

Even with a short barrel, it can still give more speed. It's matching case capacity to bore ratio and bullet weight, more than barrel length has anything to do with it.

Really enjoying this thread….



B

Interesting the mag length is 3.060" and the COL touching lands hard with 143gn ELDX is 3.035". I have some loads prepared at 2.955" and some 150gn LRABS at 2.925" so a massive jump.

Will load some at 3.015" COL for 20 thou jump? Are ELDXs very jump sensitive?

Originally Posted by Tikka7mm08

Will load some at 3.015" COL for 20 thou jump? Are ELDXs very jump sensitive?

Not in my experience

Originally Posted by dannyb

Not in my experience

Same for me too. My 6.5prc liked .050" jump and 0.120" jump with the 143s

Trying to wrap my head around this same pressure more speed with longer COL Berger statement.



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Originally Posted by Tikka7mm08

Trying to wrap my head around this same pressure more speed with longer COL Berger statement.



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Because you effectively have a bigger case if it's not half full of projectile.
Not going to be as noticable in something with a large case capacity.

Originally Posted by veitnamcam

Because you effectively have a bigger case if it's not half full of projectile.
Not going to be as noticable in something with a large case capacity.

I think of it like a 1600CC engine and a 6000cc engine both being fed say 10 mls of petrol per second.... the 1600 will be reving its nuts off and the big 6ltr will be at idle.

the .270w is a classic for this...the short throated ones wont take anywhere near as high of powder charge as the long throated ones.....the weatherby line of cartridges had a long throat for similar reason..the projectile could start moving easier in effect creating a bigger cartridge space to lower pressure.
or so I believe.

143gn ELDX on left at 2.955" COL and same again on right at 3.015" COL (30 thou jump and fits in mag). Testing longer length at 60 and 60.5gn with RE26.



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Originally Posted by Tikka7mm08

143gn ELDX on left at 2.955" COL and same again on right at 3.015" COL (30 thou jump and fits in mag). Testing longer length at 60 and 60.5gn with RE26.



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Holy hell where did you get all the 143 from

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I tend to go OTT when getting into something new. No 7mm in the cabinet now except a young fella I load for every now and then...but always could be drawn back to a 7mmSaum in the future after having 2 of them.