An over/under will give you the larger fore end. If you haven't got one then this is a legitimate excuse to buy one now.

Large fore ends are illegal on side by side doubles in the US, and punishable by death in some states I believe

well, maybe it should be...

I have small hands so my fingers don't obscure the sighting on my Merkel SxS. I do wear gloves on both hands now when shooting on the range. The left hand glove is to prevent coming in contact with the uncomfortablly hot barrels (8 shots reasonablly quickly leaves the barrel quite hot, and especially if sharing the rifle with someone else who has already fired 8 through it).

(Black powder burns much hotter by the way, and you really can't shoot competition with a black powder SxS without gloves, no matter how deep your voice is.)

The right hand glove has the trigger finger part cut-off and is used to minimise impact of the rear of the trigger guard against my middle finger - besides the gloves come in pairs and I'd looking silly only waering the LH one.