I here what is being said regarding the lower grade ammo being accurate for some folk and their rifles but OTOH, it has been said and is a fact, that batch testing, different lots can have violently different results in a given rifle. From the beginning of my ventures into .22 target shooting, I have mostly used E'Match of various batches. Purchasing 400 at a time. I have had varying results but always put it down to my poor shooting if it went wrong. On one occasion I purchased a tin of 500 Magazine, because I was told that they shot very well and were cheap. Apart from all the grease on them, they were average in my experience. The recent use of a batch of E'Club, which gave me terrible results, which I again put down to my own inability to shoot accurately and it pi**ed me off, caused me to immediately, (at the same venue and time), Change over to shooting a couple of groups with my latest batch of E'Match. I didn't remove my jacket or anything else between the change. I just got down and shot.The change in accuracy was so immediate and to me astounding, that I am certain that this batch with it's particular speed rating suits my rifle extremely well. I shall attempt to get another batch as close to that speed rating as possible and see how it and I perform.
Thanks for all the very useful advice and comments.
Bob G