bradders Posted April 20, 2017 Report Share Posted April 20, 2017 This probably isn't the right place for this, but I thought I'd show it anyway While the lathe was doing its thing today, I stuck an old .223 barrel in the mill and sectioned the chamber and part of the bore, inc the throat Heres some pics of it with a round of FNM 5.56 at 2.260" and a 80 JLK seated at 2.517" May be of interest to some of you Link to comment Share on other sites More sharing options...
deadcenter Posted April 20, 2017 Report Share Posted April 20, 2017 great stuff, how can anyone not like that. Firearm engineering soft porn Not something you get to look at every day. Thanks. Link to comment Share on other sites More sharing options...
MrCetrizine Posted April 20, 2017 Report Share Posted April 20, 2017 Is that a SAAMI standard .223 chamber? Is that length of freebore about the norm? Do you know roughly how many rounds that's likely to have fired? I find stuff like this fascinating. Cut more things in half. Link to comment Share on other sites More sharing options...
P3T3R Posted April 20, 2017 Report Share Posted April 20, 2017 Always interesting to see these sorts of things and gives people a better understanding of whats happening in there. Link to comment Share on other sites More sharing options...
bradders Posted April 20, 2017 Author Report Share Posted April 20, 2017 Is that a SAAMI standard .223 chamber? Is that length of freebore about the norm? Do you know roughly how many rounds that's likely to have fired? I find stuff like this fascinating. Cut more things in half. Chamber is .223 Wylde I don't know what the round count was, but the barrel is 4 years old according to the proof mark. The JLK is just for comparison and was loaded to fit my own rifle. Last year I loaded some to touch the lands and OAL came out at approx 2.450", so one year and around 1000-1200rds later (give or take) and there's been around .060" throat erosion Link to comment Share on other sites More sharing options...
MrCetrizine Posted April 20, 2017 Report Share Posted April 20, 2017 That's really changed my view on what I imagined bullet jump to be like from the bullets point of view. Thanks Mark. If you ever have free time and old things again, a section of the muzzle end of a really worn barrel could be interesting. Link to comment Share on other sites More sharing options...
snakeman Posted April 20, 2017 Report Share Posted April 20, 2017 Excellent images, bradders. Not often we get to see inside the chamber/barrel with such clarity - thanks for sharing Link to comment Share on other sites More sharing options...
NoEntry Posted April 21, 2017 Report Share Posted April 21, 2017 brilliant photos. Link to comment Share on other sites More sharing options...
terryh Posted April 28, 2017 Report Share Posted April 28, 2017 Mark, Useful and interesting, thank you for doing/posting! T Link to comment Share on other sites More sharing options...
NoEntry Posted April 28, 2017 Report Share Posted April 28, 2017 i would love one of these as a desk ornament !! Link to comment Share on other sites More sharing options...
maximus otter Posted April 28, 2017 Report Share Posted April 28, 2017 Fascinating. Thanks! maximus otter Link to comment Share on other sites More sharing options...
Tikka4Sika Posted April 28, 2017 Report Share Posted April 28, 2017 Excellent. Cheers. Link to comment Share on other sites More sharing options...
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