Add load port to Borden BRMXD

[LVLAaron]

I have a buddy with a BRMXD who wants to add a load port. Making a hole is easy enough, but is there any risk of the action twisting/bending?

 

[LVLAaron]

and... I assume the bodies are as hard as woodpecker lips?

 

[jackieschmidt]

Not hard at all. Borden uses 416 for their action bodies, which has very good machining qualities.

I’m not sure to what RC Hardness they temper them. But I would venture a guess that all of the finished work is performed post heat treat.

If you use good sharp tools and coolant, Cutting a port should have no affect on the machined accuracy of the action.

 

[Fuj]

I've done a couple in the past. I prick punch the area to be
milled out. If you don't make any kind of impression, just use
a carbide cutter. I never needed one though.

 

[CCM]

If it's 416, it should be around 38hrc.

 

[LVLAaron]

Y'all aren't doing a very good job of talking me out of this.

 

[PatMiles]

Y'all aren't doing a very good job of talking me out of this.

Aaron,
DON'T do it!

 

[sdean]

Y'all aren't doing a very good job of talking me out of this.

Let me know how it comes out and I'll send you mine.

 

[Alex Wheeler]

Done a bunch with another here. The first Borden drop port made I cut. Do they move? If they didnt we would have that perfect cnc action you read about.