So ERFB has fins that help glide the ordinance towards the enemy thereby increasing the Range.
So its all about the Ammunition, nothing to do with the Gun itself.
No, the rounds would have different range and speed just like a rifle have different range to the same bullet.
The Barrel length and the muzzle velocity would have the greatest effect on the range, where the barrel length would determine the rifled pattern of the round, the muzzle velocity itself determined the initial speed of the projectile, thus going to put in the difference of the round itself.
Also the Gun Recoil reduction, Gun barrel elevation and even the weight of the gun can also somehow play into the range of the round too.
I did some digging and It appears ordinance that uses fins to increase sacrifices accuracy for Range. So its useful for saturation bombing, not targeted attack which India would need.
Excalibur needs a GPS to bring back its accuracy to acceptable levels and even improve it considerably.
That makes the ammunition ridiculously expensive. (for India)
This statement is wrong in
ANY and
EVERY Level
Testing Raytheon's Excalibur: Artillery Accurate to 5 Meters at Over 20 Miles Away - Guns.com
The FoF GPS system and the fin is there to increase accuracy, basically, they are to replace Copperhead and to be used for precision strike package.
Raython Claim a M982 round can hit within 4 meter in any given Range to the maximum range because of the Fin and FoF GPS.
And for normal saturation targeting, the US uses M107 round
M-777 has range of 40 km using ordinance like Excalibur.
Dhanush which is the Indian version of HF77 gives a range of 38 km using regular ERFB-BB.
With specialized ammunition like Excalibur, the range would be around 50 km. Assuming a standard 30% increase in range.
Which was my point all along.
No, it did not get there like that
Swedish Bofor would have 35 km range using Excalibur because of the barrel length and recoil from the heavier gun. Which dissipate energy used to push the round forward to compensate for the recoil.
Now, I don't know how much of modification the Indian Bofor done to it, unless the indian version have sort of a state of the art muzzle break and significantly lighter build, the range would be more or less the same as the Swedish Bofor