120mm Ammo used by...

[Imp]

Guesses I have seen that seem more reasonable, DM53 as fired from L55 but if sources are to be believed there is very little in it between current latestGerman & US rounds. I have not seen any new guesses or Russian rounds for a while. These are I would say best case estimates when you eventually get verified data if ever tend to be about 10% over the top. Best to err on the safe side what people can field.
One thing that seems to have some basis in fact is US early guns cannot fire due to pressure problems. Also note Chineses m/s seems high
M829A1 : 1575 m/s , 700mm RHA @ 2000m
M829A2 : 1680 m/s , 780mm RHA @ 2000m
M829A3 : 1580 m/s , 880mm RHA @ 2000m
DM53 : 1670 m/s , 820mm RHA @ 2000m German
Charm 3 : 1534 m/s , 730mm RHA @ 2000m English
Du 3BM42M : 1600 m/s , 660mm RHA @ 2000m Russian
125-2 : 1720 m/s , 690mm RHA @ 2000m Chinese

To be honest as on my other computer cant say if takes into account diffrent way of measuring as in marks a steel plate at back or passes through etc.

[Imp]

Note some sources claim 1750 m/s for the Russian round its all very debatable.
For basic info & if you want to see what US rounds look like this is not bad
http://www.gd-ots.com/

[DRG]

Originally Posted by Imp

Guesses I have seen that seem more reasonable,



M829A1 : 1575 m/s , 700mm RHA @ 2000m
M829A2 : 1680 m/s , 780mm RHA @ 2000m
M829A3 : 1580 m/s , 880mm RHA @ 2000m
DM53 : 1670 m/s , 820mm RHA @ 2000m German
Charm 3 : 1534 m/s , 730mm RHA @ 2000m English
Du 3BM42M : 1600 m/s , 660mm RHA @ 2000m Russian
125-2 : 1720 m/s , 690mm RHA @ 2000m Chinese

To be honest as on my other computer cant say if takes into account diffrent way of measuring as in marks a steel plate at back or passes through etc.

This is the one and only source I have seen that gives those numbers for the M829 series and the only two that gave anything close to 700 for the A1 gave the penetration at 1000 m and the only other source that gave A2 780mm gave it for 1000 m and 820 for A3 ? I HAVE seen this comment from tanknet

That Collins..
"downgraded his estimate for the M829A3 from 960mm@2000m to 820mm@2000m.''

so it woud appear at some point that the data I had that quoted Collins at 960 pen was indeed quoting collins it just wasn't up to date and the 820 estimate you are using has been revised once again


The bottom line is everyone with an opinion on this has different numbers so no matter which ones I use somebodys going to say I'm wrong. In many cases what I have done is if there is a variety of opinion where I might see five estimates with a range between say... 620 and 710 I add them all up then divide by five to get the middle estimate or , of they are just too weird I go with Collins and anybody who doesn't like Collins data can go argue with Collins.

As well, the game has a built in variation of 5 - 6 cm for the base average and best achieved penetrations players who are paying attention to messages will see a range of pen that could conceivably cover the high and low estimates out there which are, as I said before just people "guessing" using a variety of math formulas with a bit of " this penetrator or this long and this thick and that ones this and that and THEREFORE........." pontifications. The people who REALLY know aren't telling

Don