[Goose]

I thought it was a typo, but the 105mm ammo being supplied by the US is correct.  It sounds like M119A3 105mm howitzers will now enter the battlefield for Ukraine thank to the Brits.  Goose, do you have any insight on these, I'm assuming much smaller rounds, but maybe faster shoot and scoot capabilities?  Also can the 105mm rounds be used in tanks as well?

For many years the 105mm howitzer was the ubiquitous US artillery piece. The rounds are smaller and have much less hitting power. They are also towed pieces with split tails. We still use them, particularly in light infantry (airborne) divisions. Many National Guard units also still have them. The 105mm howitzer is not technically "obsolete", but it is much less common than it once was in NATO usage. They are easier to move around, being quite a bit lighter. In general, split tail pieces are slower to emplace and displace than the M777, but it is the type Ukraine is most familiar with. So they probably don't shoot and scoot any faster. Obviously self-propelled guns are the best in this regard. The 105s are easier to tow because they are lighter, and they are easier to load because the ammunition is lighter. You also have to fire more rounds to do the same damage, but sometimes volume of fire is more important than explosive power. I am not sure why this is happening. It may be Ukraine needs something to replace their 122mm Soviet era weapons, or it may be that lots of 105mm ammunition is available.

There are still a few NATO tanks that fire 105 mm ammunition. The British apparently have some Centurion tanks that fire it, although many (most?) have been upgraded. The "original" Abrams tanks did, but all have been subsequently modified/replaced with 120mm smooth bore guns. I am pretty sure this is not an intended use of the ammunition being provided.

[Goose]

I thought it was a typo, but the 105mm ammo being supplied by the US is correct.  It sounds like M119A3 105mm howitzers will now enter the battlefield for Ukraine thank to the Brits.  Goose, do you have any insight on these, I'm assuming much smaller rounds, but maybe faster shoot and scoot capabilities?  Also can the 105mm rounds be used in tanks as well?

For many years the 105mm howitzer was the ubiquitous US artillery piece. The rounds are smaller and have much less hitting power. They are also towed pieces with split tails. We still use them, particularly in light infantry (airborne) divisions. Many National Guard units also still have them. The 105mm howitzer is not technically "obsolete", but it is much less common than it once was in NATO usage. They are easier to move around, being quite a bit lighter. In general, split tail pieces are slower to emplace and displace than the M777, but it is the type Ukraine is most familiar with. So they probably don't shoot and scoot any faster. Obviously self-propelled guns are the best in this regard. The 105s are easier to tow because they are lighter, and they are easier to load because the ammunition is lighter. You also have to fire more rounds to do the same damage, but sometimes volume of fire is more important than explosive power. I am not sure why this is happening. It may be Ukraine needs something to replace their 122mm Soviet era weapons, or it may be that lots of 105mm ammunition is available.

There are still a few NATO tanks that fire 105 mm ammunition. The British apparently have some Centurion tanks that fire it, although many (most?) have been upgraded. The "original" Abrams tanks did, but all have been subsequently modified/replaced with 120mm smooth bore guns. I am pretty sure this is not an intended use of the ammunition being provided.