I purchased one of the kits for reloading .22 rimfire. It appears to use a potassium chlorate priming mixture that is mixed from base components just before repriming the .22 rimfire case. I have not chemically analysed the contents of the priming mixture, but they appear to be the correct colors and in the correct proportions, for a potassimum chlorate based primer, from formulas used and considered in other forums.
If .22 rimfire cases can be reprimed, so can either boxer or berdan primers. It seems a little easier to reprime a berdan primer than a boxer one, but there is no large difference. It is easier to decap boxer primers than it is to decap berdan. Battery cup primers for shotgun shells can be disassembled after firing, but take about twice as much priming compound as do the rifle and pistol primers, which take about .3 to .5 grains of priming, about .02 to .04 grams.
All of the chemicals needed to recharge primers of either the berdan, boxer, or battery cup varieties seem available in India, but of course, it is a moderately time consuming process. I would expect that a hundred primers could be recharged in less than an hour, once a person became familiar with the process and safety procedures. The primers would, of course, be corrosive. Tooling is minimal, and could easily be made by hand.
Potassium chlorate would likely be the most difficult component to find, but it is used in the cottage manufacture of safety matches in India, so it should be available. I can buy 454 grams (1 lb) through the mail in the U.S. for $9. That would be enough for 20,000 primers. Sulfer should be easy to get; fine ground abrasive available; a gum/binder not too difficult. In the .22 reloading kit, acetone, grain alcohol (denatured), or wood alcohol is used to wet the priming compound, activate the gum/binder, and reduce sensitivity while recharging the .22 case. The cases are then set aside to dry with the priming compound hardening into place.
I am not suggesting that anyone do this, but it appears that recharing primers on such a small scale, mixing less that 1 gram of priming compound at a time to rechage primers immediately, is simply part of reloading cartridges when factory primers are not available. One of the greatest subject matter experts on reloading in the United States, Maj. George C. Nonte, jr. remarked on the practice during WWII, when finding components was a problem. It entails risk, but the risks are small if the safety procedures are followed. There are a significant number of Americans who are involved in such reloading for specialty purposes, although they are not a large percentage of the population.
People more knowledgable than I will have to decide if this would fall under the exception for personal reloading and for the weight limits for personal possession of gunpowder. I do not know, for example, if potassium chlorate is a controled substance in India.
Here is a link to an NRA reveiw of the .22 reloading kit.
http://www.ssusa.org/articles/2015/8/18 ... mpetitors/