hatsan 155 torpedo crono #s

[SMOKEY]

after the gun settled down a bit i only had time to test 2 pellets the jsb 15.9 and h&n 21.4 not a 100% shure but i think both claim a 5.52 head size although the h&n were considerably tighter than the jsb which in my opinion were still to tight so i am looking around for some smaller head sizes anyways it went like this
jsb             
avg. 928.7 fps 5 shots
eng. 30.46 lbs.
h&n
avg. 793.7 fps 5 shots
eng. 29.80 lbs.
this gun is stock out of the box with about 75 shots through it and it is a bear it will wear you out but the weight of the gun helps with being steady i haven't really got into accuracy testing yet and have 4 more diffrent pellets to crono then i will accuracy test and then finally home tune and gas ram conversion with yellow kaller and a new seal if needed again i felt the h&n pellets were just to tight to consider the fps #s a good representation of that weight (21.4) of a pellet chairgun pro agreed all in all i feel this hatsan gun offers alot for the price

[leadslinger22]

i have the torpedo 150 .22cal; do you know if they use the same spring/gas ram, and if so could you tell me the exact model i should order for mine?