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I’ve been using the jsb 18.13 in 5.53 head size. The 5.52 do seem to move sometimes

On the plus side I’ve managed to set my reg to 100 bar and it’s shooting jsb 18.13 at 900 fps with really good consistency. Hopefully the jsb monster lights will perform well when they arrive later this week

I’ve just tried the zan .219 22 grain slugs in my k1 but they seem to jam realy easily, I’m surprised as they were advertised as slugs for guns which shoot straight from the magazine. I’m in the Uk and I’m struggling to find any slugs that are the right size for the k1 and aren’t too heavy.

I’ve ordered some of the jsb monster lights to try first 20.83 hopefully they will work well as they seem like an ideal compromise between the 18.13 and the 25.39, if they don’t group well I’ll start making my way through the other redesigns. I’ll let you know my findings.

can anyone tell me which of the jsb redesigns work best in the huben k1? There are now shallow and deep versions available as well as the original ones. I’m not sure which to try. Thanks

Which mount do use with your Zulus on the huben? I have a 0moa but I think I’ll need maybe a 20moa for the huben?

What is your reg pressure?

This is what I wanted to find out as I don’t plan on shooting 18.1’s faster than 900 so lowering the reg to around 100 maybe ok for what I need? And once I have my tune sorted I have no problem with putting the huma reg in for more consistency it sounds ideal

Thank you guys for all your replies, I do appreciate the advice. I’ve read through this whole thread a couple of times now but felt I just had a specific question that I hadn’t seen answered. I have more of an understanding now so thank you.

I’m hoping to get a K1 in .22 soon and I’d like to try and achieve as high of a shot count as possible. I want to shoot jsb 18.1 at around 850 fps. I’d also like it to be quiet. What would be the lowest reg pressure I can use? I was thinking 110/120? And will having a lower reg pressure make the...

Could you tell me what your reg pressure is on that tune and also what bar are you filling up to to get 150 shots per fill? Thanks