DIY drill and tap ?

[campcreekfarm]

Does anyone drill and tap their own guns on here.  My question is that I have an 870 20 gauge that I need to drill and tap in order to put a Weaver base on it so that I can install a scope and I have no idea what size bit and tap that I need to order.  Thank you for any help that yall can provide on this.

[I hate turkeys]

Holes are forever.
I know how to do it and do my own. But unless you have a press a good vice and experience
using the equipment I would recommend you stay away from it.
Sorry for sounding so negative.

[Strutr]

Rather than putting holes in your receiver, why not just get a B-Square saddle mount that uses the trigger group pin holes for  attachment?

[SumToy]

6-48 or 8-40 the normal.  now you can put anything you want but you want fine threads.

[campcreekfarm]

Holes are forever.
I know how to do it and do my own. But unless you have a press a good vice and experience
using the equipment I would recommend you stay away from it.
Sorry for sounding so negative.

I have presses and vices.  I just need to know sizes.  I need to learn sometime.  I figure now is good enough

[campcreekfarm]

Rather than putting holes in your receiver, why not just get a B-Square saddle mount that uses the trigger group pin holes for  attachment?

I had one of those once years ago.  Didnt like how high I had to hold my head and the thing got loose and caused me to miss a couple gobblers before I noticed.  This was on a Beretta which only had one pin really holding it though.

[campcreekfarm]

6-48 or 8-40 the normal.  now you can put anything you want but you want fine threads.

Thank you.  I will get those 2 sizes ordered.

[shedhunta]

I did my own. If you have a press with a vice its not bad at all.  6/48.  I believe I used a size 30 drill bit

[Tsawyer340]

Easy if you have the right set up, but if you don't it could get ugly in a hurry. Prolly best to take it to a gun smith or get a saddle mount

[campcreekfarm]

Easy if you have the right set up, but if you don't it could get ugly in a hurry. Prolly best to take it to a gun smith or get a saddle mount

I did it.  Very easy.   The only gunsmith that I know of in these parts charges $100 to drill and tap a gun.  I was willing to take a chance at that cost, ha. 

[I hate turkeys]

Weaver makes a base for a 10/22 that works well. Use the groves on the top of the receiver to find the center of the receiver.
Brownell will have what you need.
Level the receiver in the vice use the base to mark  your holes don't forget to center punch the holes.
Get some bar stock to practice getting everything lined up.

[backwater]

I did my own but i have machining experience.  I wasn't going to pay $100.  Take your time getting it set up.