As I said before your history even if written in stone is not a real proof, the real proof of your lineage is only your Y lineage and for females it is their mtDna lineage. A bheel of R1a1a is more closely related to a R1a1a Jatt than the L-M357 Jatt to another R1a1a Jatt, that is why we have to get into testing Jatt Ydna. One might be very proud of his History, if there is such an unbroken account of one's history available, but when tested and if that person is found to carry British Y lineage, then all that history becomes meaningless.
To definitely relate to someone ancient, one will need an ancient Dna match, Tarim Basin Mummies [YueZie area] are basically R1a. R1a1a is a very old subclade, so relationship at that level is not indicative of much as you can see here,
http://www.yfull.com/tree/R1a/, one need to test for much younger subclades to find the age of relationship with other groups.
It is not always difficult to ascertain the Ydna flow, even if the Bheel have the same Haplogroup, if both are tested, it will tell how far back they had a common ancestor, very very old relationship may tell that it is older than the Jatt identity, so meaningless to Jatt History, but the recent relation will show NPE[non parental event], adoption etc. Generally speaking R1a1a in Bheels and other tribals is an outside influence.
For the origin of a Haplogroup or its sunclade, the diversity at a location is considered more important than its quantity, so that again is not really a big problem at all. And if ancient Dna is available then the job becomes even easier.
History does not matter much as it is scanty at best and mostly biased thus unreliable and useless, it is more like garbage in and garbage out thingy. But if you can find the Tomb of a king and relate his Dna to someone alive today, then that certainly will make difference to that person's history.
My information is not from a study but came from the people who have tested with FTDNA and 23andMe. Actually it looks more like 35% L-M357, 40% R1a1a, 10% R2, 5% J2, 2% G, 1% Q, 1% J1 and 6% other etc. R1a1a seem to be of IndoAryan[Scythian] origin, L-357 seem to belong to Iranic Tribes. Ancient samples and largescale testing will put an end to the speculation, I guess.