NSA alternative to FX Hybrids?

[jking]

Just got a new 1:22" twist 30cal 700mm liner for my Impact and so far it's looking VERY promising so far with the FX slugs. Has anyone had any experience with this liner and tested any of the NSA's to give an opinion? Supposedly the liner is built around the Hybrid slugs and 44.75 pellets so I'm leaning toward the three lighter weight NSA's (43.8, 47.2 or 49.5's). 

Jking 

 

[Long_Gun_Dallas]

The hyprids have a large hollow cavity. Bearing surface will be a lot larger for that weight versus a solid projectile. I'd be trying some griffin ldc slugs. That's what I use in my 22 superior and they shoot fantastic 

 

[AIR-Nashville]

I shoot NSA 26.8gr slugs out of my Dreamline and Impact Mk II and they both have 700mm barrels. I shoot both at ~950fps. I found that under 900fps the groups were loose. 925-950 seems to be the sweet spot. I’m very pleased with NSA in all my guns and they are more economical. I know this wasn’t specific to the 30cal question but, wanted to share my experience.

 

[kip5555]

Air Nashville. Could I ask what are your settings at? And is that a .25? Thanks. Kip 

 

[jking]

Air-Nashville, I agree in general also about the NSA slugs. My favorite in 22cal is the 20.2gr at about 1020 out of my 700mm Slug liner and the 29.0's and 29.5's out of my 700mm Superior. There are two or three more 25cal NSA's that shoot really well also. May just have to try a box of the 30cal and see how they do. 

Thanks

 

[Spray1Mark]

Both the 47.2 & 49.5 worked well in the 600mm.

 

[Cloudrider]

Superior Heavy, NSA 49.5gr @950fps =

 

[jking]

I tried the 47.2 with mixed results. Seems like some times they grouped decent at 50yds then the next time not so well. The Hybrids are still shooting very well though. No more than I plan to shoot the 30cal slugs the Hybrids may be ok, dollar wise.. 

I would be interested in trying a few of the 49.5's or doing a trade for a box of my 47.2's. 

Jking

 

[jking]

Superior Heavy, NSA 49.5gr @950fps =

Just to clarify CR, what twist is that liner?

jk

 

[heavy-impact]

I have one of the earlier .030 700mm slug liners that shoots everything great. I shoot the 66gn NSA at 947fps. My original sideshot magazine has been milled to fit them.

I don't know the twist rate without pulling the liner.

 

[bubbag]

I have one of the earlier .030 700mm slug liners that shoots everything great. I shoot the 66gn NSA at 947fps. My original sideshot magazine has been milled to fit them.

I don't know the twist rate without pulling the liner.

How are you getting that much velocity?

I have a gen 3 dual transfer port, matching probe, a heavier hammer spring, a lighter valve spring and i can only get the 66.5grn nielsons to shoot at 850fps.

 

[heavy-impact]

There are lots of posts on the work I did to it over a year ago but the main one is drilling and tapping the rear block to 14mm for greatly improved flow from the external plenum. The barrel is lightly polished and treated with Dow Corning Molykote M77 to reduce friction and leading. Every part has been worked to increase airflow and that velocity comes at 150 bar. I'm going up to .35 cal now but I'm reinforcing the feed mechanism first to handle extra recoil.

 

[Cloudrider]

Superior Heavy, NSA 49.5gr @950fps =

Just to clarify CR, what twist is that liner?

jk

Superior Heavy is 1:22

New Superior Standard STX is 1:26 ( for pellets and hybrds)

Original Superior STX is now called STX Superior "slow twist" 1:37

 

[Cloudrider]

 

[bubbag]

Thats awesome.... gonna look into doing that...

 

[tigerhunter]

Conditions are terrible here but I tried several nsa slugs and hybrids and the hybrids where the clear winner but the 43.8 nsa slugs were a close second. Btw 1:22 700mm impact mk1at about 900fps