There is an easy way to restrict those who want to spend silly money on equipment to gain a small advantage... it has been used successfully in some motorsports (despite the howls of protest which some greeted it with on its introduction )

The organisers pick a limit which an average outfit (eg rifle complete including scope and any items fixed to it, excluding gunbag, pellets etc) and nominate a value which should not be exceeded, say for example £600 (purely for example, please don't get excited about the figure chosen, not at this stage anyway!!).

The rule is then implemented, and must be agreed by competitors when they sign on, that the winners rifle may be bought by any other competitor for the stated figure, (in this case £600). If the winners rifle is worth £1000+ then unlucky, she/he knew the risk when he/she entered, if it is worth £200, then they either keep it or make a healthy profit.

Works in other sports....