"гениальное"  решение при установке тепловизора в маске орудия- наглядное тому свидетельство

Теперь у "Чалли" есть замечательный тепловизионный прицел

особенно вспоминая "гайку"

"гайку"

наверно это про чифтен 5/2

Back to the 1975 trials and the question who outperformed whom:
the competition was between 105 mm/APFSDS (XM735E1), 110 mm/APDS and 120 mm/APFSDS, plus HEAT rounds for all. German arrow proved the best in terms of penetration, with XM735E1 close and APDS far, far away. Targets was "T62" (projected level of protection of Soviet T-62), "T62M" (upgraded T-62/projected T-72) and so called Modern Technology Tank (possible future Soviet tank; although no special armour was involved, just thick conventional and spaced armour arrays).

In terms of accuracy results were opposite, but differences were not great (few %).

HEAT penetration trials were static only, with FRG again on top because of caliber and new explosive filler (no details about it).

Those results were used for official findings. But it was not the only shooting during evaluation. US and UK also presented so called Growth Potential projectiles: the former XM774, the latter experimental 110 mm APFSDS and modified HEAT. And that 110 mm APFSDS, as it is said, outperformed German competitor.
Due to rigids rules of evaluation, those results were not used "officially", but for sure a good performance of US DU projectile and tungsten UK arrow was enough to make some folks doubts it German option is the best. Hope for winning evaluation was one of reasons why UK decided to go with rush-programme of new technology rifled 120 mm.

It could be found that that "hot" UK 110 mm APFSDS was a base for next developments, 105 mm PPL64 (later L64) and 120 mm XL22 (which lead to L23?). The question is where did that UK APFSDS came from. It looks like British started that development not much before 1975 trials and it was ready enough in very short time. Looking on troubled US APFSDS programme, which started in mid 1950s, UK progress is incredible.
There are few options:
- UK started works on APFSSD much earlier than it could be read;
- UK borrowed some technology, probably from US (it was common later in 1970s, f.e. UK tested US DU cores for 120 mm ammo).

Sources are from TNA.
In 1975 only one model of German APFSDS was used. In 1976 - probably the same, a bit better engineered. It was proto-DM 13, with two-part tungsten core in steel sleeve.
XM774 performance in 1975 started thinking about DU as the best material for LPRs core. It proved better than composite tungsten-cored projectiles (XM735 and German one), especcially vs complex targets (f.e. NATO heavy tripple).
About accuraccy of Rheinmetall 120 mm vs any other gun: all depends on time scale, trial conditions, number of shots that counts etc. F.e. during early presentation of 105/120 mm German smoothbore guns to British (circa 1972/1973, probably connected with FMBT programme) 120 mm shown great consistency at one test, and failed to hit a target in second. Now think, if you are employee of Rheinmetall marketing, which trial results you will mention?

наверно это про чифтен 5/2

Сам ищу... Там ведь графики защищенности чифтена были даже емнип