Hi id4gun.
Here is a simple analysis of Indian shooting graph.
> Begin shooting in open sight/peep sight guns.
> Take part in local events to score a minimum score to participate in Mavlankar competition.
> Score qualifying requirement in Mavlankar to get eligibility in National Shooting Championship Competitions (NSCC). This qualifying score is valid only if you attend the immediete next NSCC after the Mavlankar, and is valid for 2 years. Open sight matches end at the Mavlankar and have no scope later on. Peep sight or ISSU standard matches can go on as described below.
> Score a Team Qualifying tally in NSCC (depends on the event), to qualify for the National Team Selections.
> Attend about 6-8 National Team selections held in various parts of India.
> An avarage of the top 'x' shooters in every event will be considered for induction into the National Team.
> Once in the team, you will be trained and monitored with adequate grooming. Based on your output, your entry for probable International competitions will be decided.
> Once you represent India in world cups, etc, shoot a good score to be the the top 'x' (depends on the event), so that you guarantee a berth for Olympics.
> Goto pre-Olympics and then the Olympics.
> Shoot well in Olympics to be within the top x of the list, so that you qualify for the Finals.
> Shoot well again to be within the top 8 of the final event, to be in the shoot-out.
> shoot better than ever to get another gold for India.
Simple
Now, to get to the NSCC/Team-qualifying, it is preferable to have a club affiliation. If you ahve no local clubs, join NRAI directly.
Notifications of the National Team selections are announced in the NRAI official website.
Indian made rifle (I am assuming its for the Peep-sight Air Rilfe, since that is the only one capable of taking you beyond the Mavlankar Open sight comps), have a general score average of about 92%, whcih is just about enough for you to qualify for the Nationals. For NSCC medal winning chances, it is best to rely on the Feinwerkbaus of Walthers. If you still have a great IHP Peep sight and enough confidence, who knows.
Apart from the gun, you will need quality and adequate equipment and ammo - Jacket/trouser, Sling (50m), pellets, etc. You will pick up this info and what is best for you only by practice and the right environment.
Generally speaking, you will need atleast a 97% in 10m air rifle (Total - 582) to make a mark. As you improve, your chances at the NSCC and team selections will rise.
But, as hard as it may sound, and as simple as the obvious, keen concentration, good skill and dedication will probably outweight most odds. Of course, if you have pellets that drop once in a while (say 3 out of 10 shots), then even the greatest of concentration and focus will not help. Adequacy is required, and skill/enthusiasm/concentration/dedication/discipline/LUCK form the other cards of the deck.
Dont let anyone discourage you. I am sure every shooter in the Olympic grade missed his target in his first few shots. You will improve - believe in that - force required changes - see results.
All the best