Is a slightly 'hot' load OK for the brass and barrel?

[Shane Lindsey]

Attrition is a thing...

 

[VarmintBob]

Powder amount, heat of explosion value of the powder type and size of the bore are the primary factors dictating barrel life. High pressure is the primary killer of brass. More powder, higher heat of explosion and smaller case necks create overbore conditions. This amounts to more torch effect at the case mouth and more throat erosion. "Slightly hot" is not a peak pressure value so it's hard to say how bad your load might be.