Tolerances of Lee sizing kits - over or under

[awaveritt]

Got my first Lee sizer kit for .358 the other day. I have two lee .358 moulds that drop around .359 -.360 so I figured .358 would probably be about right for several guns I shoot. But it turns out the sizer sizes them .3575. I assumed if they were a little off, they'd be off over, not under. What is your experience with the tolerances of Lee sizers. Are they most often a little over or a little under? Or can I expect some to be right on the money?

[454PB]

I only own 4 of them, and they are all within .0005" of the advertised diameter.

I don't think you can expect much better, given the variety of alloys available.

They are very easy to ream to .001" oversize, but really tough to make smaller.

[ktw]

Most of the ones I've purchased were smaller than advertised (~ .0005-.0015). I lapped them all out to where I wanted them. A couple where right on as received. None of them were too large.

-ktw

[dromia]

Seem to recall from the lee GBs their stated tolerance was +3thou of an inch no minus. That was not kept to very often on the GBs I was in on.

Their web site should have their current "tolerances on it.

[awaveritt]

As I've yet to shoot any of my newly sized boolits it might be a bit premature to ask this, but, can someone give me the crash course on how dies can be lapped? Or point me to a thread where this has already been hashed out? Thanks.

I know, I'm a bit OCD :-)

[HangFireW8]

Seem to recall from the lee GBs their stated tolerance was +3thou of an inch no minus. That was not kept to very often on the GBs I was in on.

Their web site should have their current "tolerances on it.

There have been group buys on Lee sizing kits?

-HF

[DLCTEX]

http://castboolits.gunloads.com/showthread.php?t=1542&highlight=Lapping+size+die
Click on search feature at the top of the page, type in "lapping size die", click on go. Buckshot did a good tutorial a while back if you can find it. Other good ones there too.

[mooman76]

I haven't checked mine yet but have been meaning to but I did have a 309 that was .3085 so I aquired another and it was the same. I enlarged it to .3095 though.

[randyrat]

Got my first Lee sizer kit for .358 the other day. I have two lee .358 moulds that drop around .359 -.360 so I figured .358 would probably be about right for several guns I shoot. But it turns out the sizer sizes them .3575. I assumed if they were a little off, they'd be off over, not under. What is your experience with the tolerances of Lee sizers. Are they most often a little over or a little under? Or can I expect some to be right on the money? Most Calipers don't measure to that tolerance .3575 or .0005. Maybe if you have a real good caliper it will be with in .001
I ream mine out with a dowl and 400 to 600 grit sand paper and a drill. Also your bullets will grow .0005 after a while even after they have been sized. Try casting then size and measure after about a week or two and they will have grown a .0005

[dromia]

There have been group buys on Lee sizing kits?

-HF

Nope not that I'm aware of, no need with Buckshots excellent products. Just miss read the post.