High pressure is ability to handle pressure, that quality of any normal tank gun, so they can fire all tank ammo, in contrast to artillery, or mortal.
In our case we have low recoil, coiled barre, 52 calibres 105mm(from Elbit brochure).
This i'm not sure. There is no problem to make or install low recoil gun for tank, they actually used muzzle breaks till APFSDS came.
This specific gun(Elbit one) use integrated muzzle break(this does not reduce velocity by itself, unless made on expense of barrel).
I don't know if it use some sort of hydraulic system to reduce recoil(those can reduce velocity).
Israel for example have ammo with range more then 3600m in 105mm category. And FCS of this tank is very good.
So why effective range is only 3600m?
For comparison regular L-7 105mm, also rifled, also 52 calibres effective range is 4000.
My guess is either modern muzzle breaks compatible with APFSDS reduce velocity, or they count it as barrel length(this in effect shorten barrel length), or there is sort of hydraulic system to reduce recoil that reduce energy.
Or something i don't know and actually 3600 = 4000(for example with different method of calculating such range)
Yeah but for a while low recoil guns were synonymous with low pressure ones, perhaps erroneously. No reason to think the "low recoil" label has any bearing on the performance of the gun, so far.
The choice of using a muzzle brake is odd. Elbit also makes 120mm guns, particularly the MG253 fitted to the M60 Sabra is a long recoil one with no muzzle brake.
Muzzle brakes are also traditionally considered a hazard when firing APFSDS, so are not used. But this one is said to be compatible with all APFSDS munitions, so perhaps its construction is unique.
The effective range stat is odd to say the least, usually ignored. A 105mm gun can obviously fire farther than that, with good accuracy.
When it was first unveiled, the Merkava 4 was said to have an effective range of 3km, but no gunner passes a basic gunner course without slinging some dummy HE-MP-T shells to 5km, let alone in a Master Gunner qualification course.
HE-MP shells are balanced in a way that allows them to better maintain stability over long range, but the velocity of an APFSDS allows it to hit targets reliably farther than merely 3km away.
So I'll take this with a grain of salt. It might refer to the sight's capabilities, but even that depends on whether they're referring to the basic, cheapest sight version, or some median variant.
I personally wouldn't give the muzzle brake too much weight here. Besides, muzzle brakes are usually not considered part of the barrel length so...
