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Gunsmithing 1.20"shank vs 1.25" shank

Re: 1.20"shank vs 1.25" shank

Shank? generally that relates to major diameter of thread tennon, but I reckon you mean the OD of the barrel ahead of receiver. 50 thou is a little less weight. Depends what your stock was inletted for, could mean a little more room. Strength, rigidity, not impacted hugely by the smaller diameter. Sometimes the 'shank' diameter is determined by the original bar stock diameter used in making the barrel..Leaves enough to clean up any run out..
 
Re: 1.20"shank vs 1.25" shank

I am trying to figure out why Kreiger and others offer the two dimensions on the BBL's. Just trying to figure on which one to go with on a BAT 3 Lug 1.47 Octagon and an uninletted A5 stock.I have found a Kreiger 308 5R 28" LV taper 1.20" breech end and wondering if it would be suffecient for the build.
 
Re: 1.20"shank vs 1.25" shank

personally, i think the larger diameter gives more support to the barrel/receiver joint. i think 1.2" is enough but in theory (my theory at least) the larger one would offer more support and be better but at the cost of weight.

some of my barrels are 1.2" and others are 1.25". with me shooting the rifles, i couldn't tell you which was which by looking at the target.
 
Re: 1.20"shank vs 1.25" shank

The footprint on the barrel shoulder is going to be better supported on the 1.25 vs. the 1.20

Consider though, that the running load you're going to get from the barrel hanging off the receiver is a pittance compared to the pre-load from tightening the barrel in place.

In the grand scheme the most I'd worry about it is what the stock is currently inletted for and if I need to hog material from the stock for bedding or not.
 
Re: 1.20"shank vs 1.25" shank

The stock will be an uninletted McM A5 fully adjustabe, Action will be a BAT 3Lug,1.47 octagon.Barrel, 1.20 LV 28" BBL chambered for 308. I'm just wanting opinions on this configuration.