- Jul 18, 2016
Hey there fellas running a Saum in a short action with magazines. What’s the longest COAL you are capable of running?
Well there is a lot to address there. I can’t get a long range 270 out of my mind. I first was thinking a 7LRM necked down to 270... I ended up with a 7rem mag and I am very happy with it. But the 270 still haunts me. So I stumbled on the 270SS and I have a Kelbly short action large bolt face action that could be used. My thoughts are a hunting/target rifle with a 26” tube 1-9 twist and a med/heavy barrel. I have always found that with Berger bullets I need to be “in the lands” for them to shoot the way I want. I want to make sure I have enough room to chase the lands as the throat erodes. I would certainly have to put in a call to Sherman to see what the reamer specs are like.I get it. I just want to understand more. I am using AI mags in my Tikka build for the 280AI 175 Berger EH. Had the same COAL problem that’s why I made the switch. Obviously different beast but AI mags were the answer.
I should rephrase my question Chris what bullets are you using and what COAL do you need to hit the lands? What action? Hunting Rig or Target?
I have a lot of interest in this thread. Also check out these Curtis mags, the one I need hasn’t been in stock for months but they are sweet. Ultra light which makes them ultra expensive. Only a 3 rounder great for hunting. I have concerns with the feed lips being fixed curious if that will cause issues.
Machined from aircraft grade 6061 aluminum 3 round capacity Works in conjunction with AI mags Flush fit with bottom of stock (.225" below stock on short action .308) (.500" below with long action magnum) Tuff RAM Hard coat anodized Available in short and long configurations .308 and...www.curtiscustom.com
Good info thank youLooks like @Aeon is using a standard action. Not sure what action length you were referring to @Chris240. The Shermans SS can be run out of a short action. Below are pics from my 6.5 RSAUM 4S. The bullets are Berger 140 Elite Hunters (best hunting bullet I have ever used) sitting a modest .011" of the lands.
The pic is of an Accurate AI magazine short action (without binder plate) loaded with the bullet mentioned above.
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A lot of good info thanks manNot sure if this helps, took a few photos of my 6.5 saum rounds loaded with 140gr berger hybrids. You can see how deep you need to seat them. Anything more than 140 and you are way back in the case. This was. 030th off the lands. Chamber cut with the 081 throat gap 4s Reamer. You can chase the lands all day as you can see
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Here is one in a long action ai mag
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They do not feed well at all the nose dives and they get hung up
So the old rig was a 6.5rsaum chamber. I liked it but never feel in love for what I was doing fclass target competition. To be fair I was new and pushed them hard. I have since changed the barrel over to a 7rsaum to shoot the 184gr burgers. Custom throat to have. . 200th bearing surface in the neck. They are seated way way long and fill a long action mag nice. So far I like it a lot.
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Here are both the 6.5 and 7 so you can see how they sit.
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Just how accurate is the 7? This was my second relay with the gun. It's not even broke in yet and it shot a 199 8x a few more of them and I'll have my high master rank
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