.177 New JSB KO 10.03gr MK3 Slug

[Pumacarl]

First impression with these slugs is very good! Just got them today and was a little bit impatient and I shot them out of my Vectis w/o pulling a patch first. At first they were shooting large 2" groups and I thought, nope, but I kept on shooting and sure enough I just needed to season the bore. Through about 30 shots the groups really started tightening up. I was shooting just under a 1/2" at 40y 965fps. I went around shooting at more distant things (like pine cones) checking Strelok and looking for Starlings and these little guys zip and blow up nicely. Won't be much left to ricochet or to pass through a Starling.

Funny, I remember always having to season the barrels of my FWB124's every time I switched pellets, but I have rarely had to do that since getting into pcp. I am left wondering now, if I hadn't given some of the other slugs that I have been trying lately enough of a try. The NSA lead is very different from the JSB and slugs need more cleaning and are more sensitive to everything so I guess I shouldn't be surprised, just not used to it.

I would say that these slugs shooting performance is halfway between a good pellet and a good slug because the bc is not what the NSA is, and it is noticable shooting in the wind. It is also noticably better than any pellet. With that said, the NSA have been ice-picking Starlings lately and pellets do ricochet, things that these little beauties won't be doing much of, so I will be shooting these for a while. They probably are not going to make it through a chipmunk either. Perfect.

 

[Florida_Man]

I’ll have to give them a try. My Bullshark likes the originals, not the mkii as much.

 

[Pumacarl]

I’ll have to give them a try. My Bullshark likes the originals, not the mkii as much.

It'd be great if you could comment on all three. Not many full product line reviews.

HAM reported back in Oct(?) that JSB would be coming out with a 20something grain .22 Knock Out, but that they were going to be .216. Seems odd (stupid really) to be releasing a lighter slug, that has less length and surface area already, in a small diameter. They must have had a reason, so I would like to read something on those too. I am really liking the Knock Outs commitment to expansion. These look like the pictures of the Halo slugs FX was supposed to sell years ago. Right now, I think their lightest .22 is a 25.39gr. I guess I have to pay more attenetion because I have read just about nothing of the reviews or comparisons of the MK1, MK2, or MK3, in any caliber. Which immediately makes me think that they are probably used most by the FX crowd, which I don't follow. Too many branches on that tree, and I don't have any reason to go out on a limb. I would like to read more about JSB KOs, in general, though.

 

[Florida_Man]

I have to correct myself, I have the originals and the Mk3’s. My Bullshark shoots the originals better. I don’t know if i have ever seen the mk2’s on the us market.

 

[Danman]

would like to read more about JSB KOs, in general, though.

Plus 1! There is a decent amount of slugs out now and these get little attention, oddly!? You are correct the 25gr KO up until now (thanks @Dairyboy ) we're the lightest .22 Jsb Slugs. I believe the slug fanfare has caused folks to want to try em in there weaker guns (20-35fpe in .22) hence the market for the lighter stuff? I am guilty myself...have tried various 20, 21, and 23gr through the S510 all with mediocre results. She's a pellet rifle through and through. Many slug brands have bumped up the thickness of their slugs ogive recently to aid expansion. The Halos are in fact waaaay behind now.