IWI GALATZ
DRAGNOOV
Vintorez SSR
VSK-94 SSR
These aren't sniper rifles, all are DMR. Vintorez SSR and VSK-94 SSR as the name suggests is Sniper Support Rifle(SSR) not sniper rifles
Your concept of sniper rifles are entirely different from world standard.
The limited numbers of OSV-96 AMR in Marcos service won't make any difference, 1st of all, no serious military uses this rifles. Only poor 3rd world countries on which Russians have great influence on them have it. Probably Marcos inducted it during the time of western scantion on India.
Sako T3 TAC Marcos have is base varient which fires 7.62 x 51 cal rounds, and it's max range won't even cross 1000m, in western countries it's used as hunting rifles by civilians.
PSG-1 is an outdated sniper rifles. Yes it was one of the top rated SR during its time in 70s and 80s, now there are sniper rifles with far better accuracy, range and provision for accessories to be fitted which helps a sniper to hit the target from more than 2000m. Atleast army have .338 LM, Marcos still don't have it.
Morden snipers in advanced military are trained to hit targets beyond 2500m using LM or NM rounds. Or they use 50cal rounds for extremely long range shots which are beyond 3000m.
To get trained for such long range shooting, they need sniper schools with multiple firing ranges with more 4000m long. Something Marcos cannot accommodate inside their 150 acres of NSWTTC.
In advance sniper course there are cources like urban sniping which requires lot of infrastructure.
In india there is no good sniper school, be it in army, air force or in navy.