![]() 823″ OD for a Belgian Lightning, made me curious so I went rooting through my gun safe. Barrels are usually thinnest about 6-10″ back from the muzzle and that is where the OD measurements are usually taken. I am unclear as to what you mean by an “Exit” measurement, but the OD measurement seems clear enough. However, the problem with all comparisons are that they only compare what they compare. Well done! Your are a true Junior Technoid when you start miking your guests’ guns! You are quite right in that it is a good chance to make a comparison. Is it possible that Browning is getting the message about barrel weight? So did another recent 32″ 425 that I handled at the range the other day. The 425 seems to balance much better between the hands. Curse me for a heretic but I would take that 30″ 425 over the FN Superposed hands down any day of the week. The bottom line, though, is how they feel. I guess what I’m getting at is that Browning’s current “backbored” guns are just that – they seem to be just removing more metal from the barrel using their “old” barrel diameters. 740 (I don’t have ready access to a bore gauge) that means Browning has reduced their wall thickness to about. So what does that tell us? I know that the Citori field has a bore diameter of. I also measured the exit diameter of the barrels. I measured the OD of all 8 barrels and took an average along their length. ![]() ![]() 012 greater on the 425 and Lightning Sporter than on the older Lightning and the FN, right? 741, the OD of the barrels should be approximately. 729 and Brownings Invector Plus bore is around a nominal. Since I’m considering picking up a 425 of my own, I have been reading the Technoid archives where Browning’s “backboring” is reported as just increasing bore diameter while holding wall thickness the same. The last gun is a recent 425 Sporter, 30″ barrels and Invector Plus chokes. Gun 3 is a recent (last year) Citori Lightning Sporter, 30″ barrels, Invector Plus chokes. One is a late 80’s/early 90’s (I know it’s at least 4-5 years old) Citori Lightning Field model, 28″ barrels, standard Invector chokes. One is a ’69 FN Superposed “Lightning” with 30″ barrels. There are 4 vaguely similar Browning stackbarrels that I have access to for a bit. I saw a unique opportunity in these guns to do a little scientific comparison to see just what Browning is up to. I have some visiting shooters in town this week, and their shotguns are temporarily residing with mine. I did not start this to question the wisdom of the Technoid.
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