I am not a hunter - and don't train my dogs for field trials - however my Tanna is from a long line of field and international field champions. The link below is for some information prepared by his breeder (Mojave Desert Beagles) - they DO a lot of field trials and hunting. Hope it's informative for you!
Joshua - I don't go there often, but American Beagler has a lot of information about trials, hunting, etc. There are many knowledgeable people there who might be better able to help you. My beagle group consists mostly (like this one) of pet owners and we have very little about it on the group.