.375 Winchester is not a bottle necked round. The case has a taper but no neck like a traditional rifle case.

Reloading bottle neck cartridges has a couple different aspects to it and takes a little longer but it's worth it if you shoot a lot. Spending $.75 to $1.00 or more per shot starts to add up real quickly. In my experiences the Hornady spray is not sufficient lube for the inside of the case mouth and will result in stretched cases that do not chamber. Additionally if you don't coat the case real well in can result cases stick in he die. Applying traditional lube is real easy and using a Q-tip to apply lube in the neck isn't too bad. I figure Spending the extra time is worth it because you are also saving quite a bit more with every round. Additionally you can download the rounds as it so you're able to shoot 50 or more rounds at a time without having to ice your shoulder afterwards.