That sorted it thanks for all the replies

Yes I removed both to change the barrel & breach o/rings I did remove the bolt but that seems ok .
I've tried single pellets and all is good the mag is cycling ok
So I'm baffled. Thanks for your replying

Sorry for the late reply I've not tried single pellets yet but the bolt slides easily with no mag in
I was wondering if the barrel might be slightly out of line or the bolt slightly bent & catching the mag somehow with bigger pellets in.also the mag works fine with no pellets in it

hi all
I stripped my s410 classic down for a service & now when I put light pellets in the mag it works fine but put heavy pellets in & the bolt is hard to push forward
has anyone got a clue what might be the problem. thanks in advance.

Hi Julian
Can you give me price for the s410 classic 177 barrel shim/ seal carrier & external o ring & molycote please

Hi All I've got a s410 classic pre/ AT I'm trying to replace the breach o ring but when i took the barrel out the brass bush stayed in the gun. So after a lot of messing. I managed to get it out .So now it's out I look at the parts list to find out witch part I need & it tells me there's an exte...