Interesting. I've been googling, and every source I've found says that the rounds were greased with both beef and pig tallow, and that the troops had to bite something off them, which obviously would be a problem for a hindu or muslim.
http://www.bartleby.com/65/in/IndianMu.html
Not sure the situation is the same, but I understand the risk you've identified. OK, who else has a proposal?