Ive played around with pellet tests for ages, just for fun really and to see what all the fuss was about pellet X versus pellet Y and was lead to believe from others and my unscientific tests that head size seemed to be the key, in fact it can help but on a recent trip to the range with my new s400 I bumped into a guy testing his stuff and he obviously knew far more than me, just going on the amount of samples he had for the day. Anyway I found with his help THE perfect pellet for my setup and it was in three sizes ?
I carried out a test using 10 tins of jsb exacts all 4.52mm but all different die/batch numbers, each pellet group varied slightly and once Id found the best, he then gave me 20 more in that die number but 10 in 4.51 & 10 in 4.53, the result was near exact group size in all three head sizes, change the die number and the group varies much more. Also looking at each die/pellet you can see the changes, some have thick skirts some wafer thin, some have deep rear recess some quite full, some have lines from the die/press some silky smooth.
This is why the canny buy sleeves and sleeves of their favourites, returning to a shop 3 weeks later for another tin that seemed OK may well results in a pellet that sucks !
On another interesting note, I had a few barrels worked on by a guy to remove the chokes completely and those barrels shoot awesome and are far less pellet fussy than any 'choked' barrels I own, so theres plenty going on inside that little tube that spits our pellets out ?
Chris
bigtoe, Harry, hydroclamp, jpsnorton, gayle89, mark410, Stu83, smallholder1, wellhouse0, readingcop, sir-slots-alot, danco1987, Stevenb, DarylDiane, simpleSimon, Ratinator, Milek, Josh, Maxtich, Woodsie99, Ozzie, master_shriller, niloc, Drake267, deejayuu, shootingstars