Wands - again

[Cathy Drolet]

No: HPFGUIDX 105232

In the PS/SS Mr. Olivander says "It's really the wand that chooses the wizard, of course," and later, "And of course, you will never get such good results with another wizard's wand." 

However, Ron has Charlie's old wand for two years (never mind that it was broken in the second year and caused all kinds of havoc).  That wand, obvioulsy, chose Charlie, not Ron, yet Ron seems to get adequate results from the wand most of the time.

Sirius uses Ron's - new - wand in PoA in the Shrieking Shack to disarm Harry & Hermione.  No apparent problem with the wand there.

Wormtail uses LV's wand to kill Bertha Jorkins (I presume it was Worm and not LV), and also to kill Cedric Diggory.  No problem with using someone else's wand here.

Tom Riddle took Harry's wand in CoS and was going to use it until Harry stabbed the diary with the basilisk fang.

Neville used his Father's wand for 5 years.  He may be a poor wizard but is that because the wand was ill-suited to him or because Neville lacked confidence?

Sirius used somebody's wand in the DoM in OotP.  Who's wand is that?  One that was left at the Black family home?  His Mother's perhaps?  He, himself, wouldn't have had a wand as it would have been taken from him when he went into Azkaban.  I don't think he could just walk into Olivanders and buy a new one, one that 'chose him'.  Did he order it by Owl Post like he did the Firebolt?  Were his spells with this wand not working adequately against Bella and that's why he was killed?  

Somebody, please, put me out of my misery here?!

Cathy

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