.20 slugs/ ~15gr ZAN vs NSA (Neilsen)/ HW90

Hi All. Anyone have experienced both of these slugs out of the HW90 (.20 cal)?
Mostly for target at this time. What fits and shoots better (accuracy) out of an HW90…or if at all?

Hoping for better, more stable accuracy out of a slug up to 50yd or better on days where there’s more than just a breeze in the air.
I have no experience with .20, but i do with NSA, and Zan. Zanne, you can shoot at low velocities, and you have nothing to worry in terms of the slug's getting stuck. With NSA, if you shoot them too slow, they could get stuck in the barrel, so just make sure that you get the appropriate weight for your rifle.
 
I have no experience with .20, but i do with NSA, and Zan. Zanne, you can shoot at low velocities, and you have nothing to worry in terms of the slug's getting stuck. With NSA, if you shoot them too slow, they could get stuck in the barrel, so just make sure that you get the appropriate weight for your rifle.
That’s actually very good to know. Appreciate that.
 
But how or what works on tuning the 90 for those Zan slugs?? And what is the correct weight slug for the most efficient tune of the gas ram? Mine sits on 18 or 19 Bar right now. Be Well Brothers, Bandito.
Good point. I guess will find out soon once I get an order of these Zan’s in. My 90 is currently set to factory (out of the box), whatever that is, hehe.
 
Wow. That is high. I don't remember at what mine was set but it was beechy to cock. Brought them all down to about 18 to 19 Bar. I haven't the fitting or the correct pump for increasing the pressure. A bicycle front shock absorber pump works and has the female fittings. Guess you will know how it works at factory when you try your slugs. I think my 90s are the 177, 20, and 25 cal. My 22 is a BSA. BE Well Brothers, B.