bojan

Research was published long time ago, so nowadays (well, since the early '80s) non-nuclear countries also produce good shaped charges. Very non-precision.

And as result they are producing two tank types, one of which is frankly junk.

For such low precision charges there is no need for complicated machining, and simple stamping works, like Germans did in WW2 with PzF steel liner.

IIRC NFA says "shorter than 16""?

It is better than 16" for terminal ballistics and only marginally worse than 20". I have somewhere local tests with terminal ballistics of 5.45x39 (7N6), 5.56x45 (SS109) and 7.62x39 (M67), with 10, 12, 14, 16 and 20" barrel length, will try to find them and post them. OTOH... for 99.9999% of civilian owners it makes no fucking difference.

I expect PLA would deal with those same way US dealt with Moros. Brutally.

Old as Roman Empire.

Except in Europe it is not.

Described by the tanker friend you are going nicely and suddenly tank is sinking into soil. Ground can often be solid enough to drive over it, but any attempt to turn or stop will lead to sinking into it.

+ lot to MZ post OTOH, I think it is unavoidable in the war lasting long enough, only question is how often it happens, because if it happens too often it is sure sign of the breakdown in discipline. Why do you expect from someone who has never served to understand section, platoon and company movement?

Not just weed, in at least some countries hard drugs are decriminalized in case of "small doses", IOW not for sale quantities. Also today's weed is way stronger, with way more adverse effects than old time one. Difference in strength of weed available here compared to the one from late '90s is staggering.

7.62x54R has fatter case and more pronounced neck, neither of which makes it easier to design magaines for it. .303 left, 7.62x54R right, 7.92x57 in the mid OTOH none has really made reliable large capacity magazines for .303 either. Bren ones come close, but gravity helps it, turn it upside down and it will start having (more) problems. Even in Bren there were at least some issues with it and it was common to download by few rounds it in service, sure sign of a problematic design.

Experience from European countries that have decriminalized drugs says that %/number of addicts did not go either up nor down. IOW, decriminalizing prevented having people's life fucked up by having drugs found on them by police, but it did not influence number of addicted users in any way.

Unless magazine closely follows taper (and very few do that fully*) follower begins to tilt backward at some point. If it tilts - feeding becomes less effective (due the increased friction). If follower is anti-tilt then top rounds front part begins to dip down, leading to a problems with feeding. This is exaggerated by the round being rimmed. This is well known problem in the pistols and reason why .22 LR is such a problem to make larger magazines for. *If you arrange 5 x 7.62x54R rounds you will see that curve is more pronounced than the one in the 10-rounds SVD mag. 10 rounds have way more curve than 20 rounds magazine and that is a problem with it. Too much curve means spring pressure is transferred less effectively which will again lead to stoppages. Chauchat was extreme example, most of it's feed problems (when mags were new and gun actually made to spec) come to a spring pressure being too weak.

It is relative thing, those mags showed reduced reliability compared to 10 rounders. How much reduced is unknown. I heard that 15 rounder almost made it, but 20 rounder had significantly more stoppages than 10 rounder. Main issue is 7.62x54R round geometry (significant taper and rim). There are basically only two ways to make reliable larger (20-30 rounds) 7.62x54R magazine: - Madsen like, w/o feed lips. - Pull-behind like North Koreans did in Type 73 MG. Neither of those is however suitable for a sniper rifle.