As a general rule match reamers are smaller than standard reamers to cut a tighter chamber. The usually have a shorter leade so the bullet engraves the rifling when chambered. With that said there are so many types of match reamers that it gets confusing.

What ever you use, just remember you have to get the action closed. 
Bob

Yes, on a match reamer, the chamber area, is always tighter, to hold the cartridge centered in the chamber but, the length of the chamber and the leads vary quite a bit, the leads can run from the "Standard" SAAMI match lead of 5° to as little as 1°.

Here is some of the chambers available, from before the 1970's, I think. I had mine made to a combo of the Freeland (.600 lg) and the Anschutz (1.5° lead). It's a little tighter loading. The Win 52D chamber has always been a good one, too. But, take your pick.

BTW, I had mine made w/o a rim so, I could vary the length, for BSing.

It should keep you up at night thinking

22 LR MATCH .2267 .2248 .600 5° .288 SAAMI

22 LR ANSCHUTZ .2255 .2248 .619 1 I/2° .288

WIN 52D MATCH .2278 .225 .580 2° .288

22 FREELAND;\1G 2242 .224 .600 2° .288

22 LILJA 2252 .224 .635 2° .288

22 PPG MATCH 2269 .2256 .630 1°-30' .288

22 ROGUE .2245 .2242 .620 1°-30' .287

22 TIME 2262 .2248 .610 1° .288

22 STINGER .2275 .226 .735 1°-30' .288 

22 BUTLER .228 .225 .750 2° .288 

22 LAKEFIELD 229 .227 .700 2° .289

22 BENTZ .2278 .2264 .6787 1°35'01".288 GOOD FOR AUTO

22 LR SPORTING .2307 .227 .775 5° .288

22 LONG .2306 .227 .775 5° .288

22 SHORT .2291 .227 .431 5° .288

22 LRSHOT .2284 .2236 .871 30° .288 

22-15-60 .2699 .2495 1.968 5° .350

Edit:
I Edited the above, to make it easier to read and I put in Italic, the reamers that I would consider "match" reamers.

If you truly want a match chamber and the most accurate, you will need to chamber with a match reamer tailored to the ammo you intend to shoot.  An amateur hack like short chambering with a random reamer won't do the same thing, all that will do is make you force the bullet and probably a bit of the case into the leade, however that is cut by the random reamer you use to short chamber.

PTG makes an assortment of reamers specifically for brands/types of ammo.  Like Joe said, you have to just trust that they know what they're doing.  I do know that Chad Dixon uses those specific reamers, and he builds/has built Olympic wining rifles.  He chambered my 40x with an Ely specific reamer, and it's quite accurate.  Probably Olympic winning accurate.  Accurate enough that I know if I miss, it's me, not the rifle.  That's assuming the Ely 10x isn't defective.

I personally use a Manson match reamer for the .22's I chamber, I had a pretty bad outcome from a custom ordered PTG that made me stop using their reamers at all.  It wasn't a reamer design problem, it was an order/shipping problem and was the third mis-shipped (wrong reamer) that I'd had from them, and since it was sent to a 3rd party gunsmith it essentially ruined a 2 barrel rifle set for me with no recourse.  I ordered a particular floating pilot match reamer, and they shipped a commercial spiral flute oil feed reamer instead, resulting in a non-match chamber and a scored leade/barrel.

The Manson reamer has always produced an accurate chamber, I have no complaints about it.  I don't know what the quality is, now that Dave has sold the company.

If you have confidence that PTG will ship you what you order, and have the ability to check it to make sure that they do, I think you'd be best off with one of their specific reamers.
 

I have an old match reamer for a 30-06 that seems to be plenty big in the body but the neck is a bit tighter. The 30-06 chamber was for military so it is very loose like most military chambers. I did send a reamer back to PTG that was .005" over the cartridge diameter and had them take it down to .003" over.