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Sticky ejection is a sign of high pressure. Whatever the actual pressure being developed in your revolver is it's my opinion that that load is too hot for that particular revolver.
I don't have data for a lead bullet but Hodgdon's latest (#27) shows 38,200 c.u.p. (the peak pressure would almost certainly be higher expressed in psi) for 9.6 grains of Universal under a 300 grain Hornaday XTP ignited by a Remington 2 1/2. While lead bullets tend to cause lower pressures to be developed when using a given load than a jacketed bullet, your use of a magnum primer will tend to raise them. In any event, a load which causes the cases to stick is too hot; the cases are expanding to a dangerous degree. I'd back the load off, and consideer changing to a slower powder. I've had great results with VV N110 & standard primers. Bob
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