Best performance

[kysingleshot]

Ok, this one may seem a little strange, then again it may not.  I tend to buy more than I shoot.  I have accumulated a few milsurp rifles and very few have been to the range since then.

I have:

Mosin Nagant 91/30
Mosin Nagant M44
Arisaka Type 99 (Last ditch, definitely but full mum)
Lee Enfield No1 MkIII
Czech Mauser/Israeli convert 7.62 NATO
Yugo M24/47 8MM (X2) (1 all matching, unissued condition and 1 shooter)
Yugo 59/66 SKS
Norinco SKS
M1 Garand

I don't think I left anything out.  Before I have to spend a week straight at the range with all these, on the average, should any of these be expected to be better than the others, accuracy wise? Reliability wise?  Overall better gun?

I'm not sure if these can really be answered or not, but with thoughts of culling the collection down, I'm not sure of what to keep, what to let go.

Anything will be greatly appreciated.

[Cheesehead]

Nice collection. Ammo will also dictate accuracy.

Cheese

[351 power]

my only advice is think hard before you sell a rifle. every time i do i end up wishing i had it back

[woodchukhntr]

The Mosins always seem to do well on the range, but Cheesehead is right about the ammo.  But good ammo won't make a bad shooter shoot well, only not as bad.

[Mikey]

OK, I'm stickin' my neck out here but, given the same quality of ammunition for all the different rifles you mentioned I would expect the oldest and most used to be the least accurate - that would probably start with the Garand, the the SKSs (oldest worst).  Bolt action accuracy could easily be a toss-up twixt the Mausers (Yugo24/47 first), the Enfield and the Mosins.  I wouldn't count on the Arisaka being that accurate, but this is JMHO.  Mikey.

[Victor3]

 You might do like I did - Sell three you don't really like all that much and buy one good K31

[TribReady]

I have:

Mosin Nagant 91/30
Mosin Nagant M44
Arisaka Type 99 (Last ditch, definitely but full mum)
Lee Enfield No1 MkIII
Czech Mauser/Israeli convert 7.62 NATO
Yugo M24/47 8MM (X2) (1 all matching, unissued condition and 1 shooter)
Yugo 59/66 SKS
Norinco SKS
M1 Garand

My collection was very similar. I ended up selling off most of my Mosins(had to keep atleast one) and a couple Enfields (wish I had atleast one of those back, but ammo was $$) and an SKS. I also went from 3 Garands down to one.  For the most part, I'm glad I thinned the herd, but you always regret selling a gun later. 
I think for accuracy, the 24/47's, 7.62 Mauser, and Garand would top the list.  Personally, I wouldn't get rid of any of those.
I'd get rid of the Arisaka, SKS's, and maybe the Enfield, but you'll have to make that decision with full knowledge that you may regret it