John,
In reality there's nothing wrong about going 10, but the OP never really defined his cartridge, what was his intended "deer" bullet/s were going to be, the terrain, comfortable/average shooting distances, etc. Although he's from Tx, it still leaves the questions, whether you assume a tower blind over feeders or not. Kinda like asking "I'm buying a new truck, what trailer should I buy"?
As to "down to the last 1/4", for years, Rock's standby twist is a 11.27", just by design of the gearing on the Pratt and Whitney machines.
While somewhat relevant to most loonies, accuracy is the is the defining barometer of a new barrel/build. So while Litz says over spinning has no downside, in reality, matching the twist to the bullet yields the best accuracy, a proven fact.
A lot guys don't have the knowledge, desire, ability, or platform to milk the best accuracy from their firearms, so the differences could never be utilized anyway.
