[QUOTE=flaxenfilly23;8599875]
I had the same issue you are having with my mare. I finally tossed the o-ring and went with a Dr Bristol snaffle. It fits her perfectly now.[/QUOTE]
Just to point out that your comparison doesn’t work.
O-ring / Loose ring is the type of cheek pieces and determine the type snaffle bit it is : Loose ring, D-Bit, Eggbutt, fulmer, Full cheek, half cheek, Baucher, Kimberwick, pelham, Dutch gag/continental/pessoa/3-ring, bevel,wilson, etc.)
Dr Bristol is a type of mouthpiece. This particular mouthpiece could be found in different snaffle bit : D-bit Dr. Bristol, Loose ring Dr Bristol, Full Cheek Dr Bristol.
Other type of mouthpieces : single jointed, double jointed (french link (or lozenge, or berry), Dr Bristol, etc), mullen mouth, segunda, double snaffle, waterford, wings, etc.
Then you have the shape of the mouthpiece: ported, slow/twisted/wire, ergonomic, etc…
And then you can add some extras: copper inlays, barrels, rollers, different types of joints (like revolvers, locking)…
Finally, they come in different material: hard rubber, soft rubber, happy mouth, sweet iron, argentan, aurigan, sensogan, stainless, never rust (brass), cyprium, salox, other different copper alloys, etc…