BSA AIRSPORTER 5 SHOT GROUPS.

[Supaflee]

Since I recieved my BSA airsporter GL (79-83) a week or so ago , I'd been unable to get it to goup within 6" at 10 metres .
 This innacuracy was due to some very cheap , low quality , rubbish pellets , the dimension of which were all over the place , huge die marks on the circumference and the actual head diameter as low as .021". they were just wobbling their way along the length of the barrel and then exiting in all directions.They are ARLAZ pointed 12.65 grain.
 I'd say unless you want to shoot flies on the wall 3metres away , dont use them!
 Ive been shooting with Gamo Pro-Match 13.8 Grain and obtaining groups of 5 inside 22mm, with open blade sights.
 The trigger pull is a little heavy , any info about reducing that a bit further would be great .
 Thanks regards Supaflee