Bullet info

[Metalman1]

Can I load a 10 mm .400 RN into a 40 S&W case?

 

[[email protected]]

Yes. They are the same diameter. Just follow the normal steps to find the COL for your gun. What grain bullets are they?

 

[ReloaderFred]

Yep. Most .400 gr. bullets are listed as .40/10mm, and there is ample data available for both calibers.

Hope this helps.

Fred

 

[rcmodel]

However, you won't find much safe data for 200 grain 10mm bullets when used in the .40 S&W.

180 is about the upper weight limit for the .40..

rc

 

[Metalman1]

Thanks for the info. I'll be using 155gr, 165gr and 180gr bullets. As soon as I get primers, I can start this new hobby.

 

[beatledog7]

When you choose powders, I suggest using a slightly slower powder for the 180-gr bullets than you would choose for the others.

I like Bullseye or similar fast powders for up to 165-gr, but HS-6 for the 180s. But you could use a slower "180-gr" powder for any weight in 40S&W.