Re the 525 and miroku 38s, my brother uses a 38 sporter,with teague stainless slight extended chokes, always found it slightly muzzle heavy,so I balanced it with some additional stock weight, this he found better balanced but slightly heavy , so this year I bought him some extended titanium chokes, wow what differance, soo much lighter especially when you stick them way out there on the end on your barrels.
subsequently removed half of the ballist from the stock,balances great and his scores have gone up,more importantly he didnt ended up trading in £££££s to get one that balanced right.
titanium chokes arent cheap but make a huge differance to the balance/feel. it was browning titaniums .there are other makes.