I am not into this discussion which is not technical but political related and other facts..
I am not very much into this vs that,
Nor this is the right thread to do so..
Your post moved here :
http://defenceforumindia.com/forum/indian-army/50038-indian-army-small-arms-11.html
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The velocity of OFB 64gran is above 914m/s / +3000ft/s from 18inch barrel compare to 62gran SS109 velocity 2900ft/s from 18inch barrel, how the recoil is suppose to be lesser than SS109 ?, the recoil is more or less same one cannot make out but only with machines, This info is wrongly put from where ever you extracted..
There are 3 carbines, Which one you talk about or heard about ?
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The carbine must be Kalantak, And the recoil is same as INSAS as M16`s in M4 carbine, Which is Obvious..
And How the round will behave depends on barrel length and twist ratio..
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The person coming with such conclusion on other thread does not have clue about the design he talks about or even types, what i can make out from your post..
Considering that these 'improvements' came over a period of 20 years says a lot about the manufacturer. Compare the evolution of guns by FN, Insas can be called whose distant cousin.
Not only does a stamped sheet metal gun made by FNC 15 years before first Insas was made have a better finish, the evolution of the receiver from stamped sheet to uni-body polymer should be noted. I was reading in other thread why Insas carbine failed because the standard OFB Insas ammunition was 'too powerful' for the carbine. Insas ammunition weighing 64grain at 890m/s exit velocity is supposed to have a lower recoil than SS109 equivalent ammunition that OFB also produces. If the carbine had a high recoil with standard Insas ammunition, it will still have a high recoil with standard NATO ammunition. Clearly the fault doesn't lie with the ammo but with the design they have been trying to implement.