Powder funnel for 300 WSM ???

[LRNut]

If you have a plastic funnel that doesn't quite fit, you can ream it out using a case mouth chamfer/deburring tool.

 

[baldhunter]

RCBS makes a powder funnel for 22-50cal.It has steps to fit the different size cases.It's what I have to use for my 300WSM.