Impact NBK vs NBK ULTRALIGHT - NEW RELEASE.

[jayquiver]

I was waiting for the new Impact NBK Ultralight to be release, before I bought my action for my rifle build. I have barrels, trigger, and stock already.
Now that I see the pics I am not sure if it was worth waiting for.

Have a look at the pics, they look like they have removed al ot of material, especially on the non bolt side. What are thoughts on how much material they removed? Too much? Looks good?

Would you go with the older NBK or the new Ultralight? I think there is about 6 oz difference (could be wrong) which puts the Ultralight right up against the Defiance Anti X which looks a little more robust?

 

[YodaSends]

I got the ultralight for my next build - but it is a weight weenie build. The fact that they are selling it with the mag bolt is probably a good sign (mine is just a normal 308 bolt). I trust Wade/Tate when they say "Nobody cares if your rifle is an ounce lighter if you miss." being a tenant of the design. That backside looks awfully like a bridge truss so should be very strong.

The biggest (probably unfounded) fear on my part is how much debris/water/etc... am I exposing the action/trigger/chamber to - I've been carrying rifles bolt-side out (and thus exposed bolt) for years.

Ultimately this action isn't for the range pig that's sending 100 rounds in short order at the range - same story for the featherweight profile barrel attached to it in my build. Ultimately the defining moment will be the cold, hopefully not too wet, first shot - and the fact that my back will scream less at the end of the day.

 

[jayquiver]

Yes. That is what I got concern with. The bridge and hole in the rear rail , look like it’s just asking for debris to get hung up in it. The non bolt side looks very low as well.

@YodaSends did you concussed the Defiance Anti X? It looks like a little more structure and low weight?

 

[YodaSends]

@YodaSends did you concussed the Defiance Anti X? It looks like a little more structure and low weight?

All my other impact actions run like a dream, don't quit, etc... so not more than cursory glances at Defiance - I do not believe their tolerances are as tight across actions based on what I have seen/read - and I have shot friends rifles and they shoot great. With my impact builds thus far, I can swap barrels among them with very little zero shift, so this one could take any of my other barrels if I need an extra rifle at the range for a friend/breakage/boredom and I want to use a cheaper caliber. It also means I can swap bolts/other parts at will

 

[BigAl!]

@jayquiver you can't go wrong with either, Impact or Defiance. Pick one and run it. I have an Anti-X and it is great, but so is my Impact NBK. So much that I ordered the new Ultralight. I trust the guys at Impact to build a superior product while cutting a little weight. The anti-x does not have similar skeletonized cuts, but cuts weight elsewhere. Without a doubt, the Impact will see more debris get in due to the design

 

[wind gypsy]

No idea on functional reality but it seems like more material removed than I'd want.

 

[Roksliding]

Bought one today! (Already have an NBK) No material is removed from the front of the action body, where the lugs would be, so if pressure or something is a concern, it will preform the same as an NBK I’d imagine, you’re good there, there is enough material to keep the action from flexing in your stock, so I don’t get the concern there either..??...

As far as “debris” what are you guys dropping into your actions?? just run your action dry, lube/oil is gonna cause more issues than “debris”. I’ve ran my impacts in dust, dirt, rain it don’t matter they work. That would be the least of my concerns. Heck Oklahoma (where the shop is) is notorious for that moon dust that gets everywhere.. those okie boys seem to do pretty good with Impact actions, and it’s always the same report (shrug their shoulders) “they just work”

I’m buying this with 100% confidence.

 

[Treelineasassin]

All that material removed and it's still 24oz? If weight is #1 goal to be reduced, there are lighter options out there.

 

[Lawnboi]

I wouldn’t be a buyer. I’m someone who would buy a standard action and lose weight elsewhere to keep crap out of my bolt.

Snow, rain, dust, dirt, sticks. I’m not taking that thing on a backcountry hunt.

 

[YodaSends]

All that material removed and it's still 24oz? If weight is #1 goal to be reduced, there are lighter options out there.

that's why I am not worried about it not breaking, they still left plenty of material behind.

I wouldn’t be a buyer. I’m someone who would buy a standard action and lose weight elsewhere to keep crap out of my bolt.

Snow, rain, dust, dirt, sticks. I’m not taking that thing on a backcountry hunt.

Pretty much every action is open to the environment on the bolt side unless you have an ejection port cover - which is the side away from my body and thus subject to the worst of everything. Here it's mostly the booty sweat from the "body" side of the rifle that I am semi-worried about. 0.5 oz of dyneema cloth and some fittings and it'll be better protected from all sides than any of my "normie" actions.

 

[jayquiver]

I am leaning towards trying an Impact action. As I’ve heard great things and I’ve also heard their 75* bolts feel lighter then the Defiance’s. I currently have a Anti 90*

I’m trying to figure out if the 6oz difference between the NBK and NBK UL is worth it.
I’m running a Pro Hunter Adjustable 1.8 pounds, Benchmark #5 spiral fluted finished at 24 , 3.5 pds and either a Mark 5 3.6-18 or Atacr 4-16.

Either action will fall between 9-10 pounds, all dressed.

 

[Lawnboi]

that's why I am not worried about it not breaking, they still left plenty of material behind.


Pretty much every action is open to the environment on the bolt side unless you have an ejection port cover - which is the side away from my body and thus subject to the worst of everything. Here it's mostly the booty sweat from the "body" side of the rifle that I am semi-worried about. 0.5 oz of dyneema cloth and some fittings and it'll be better protected from all sides than any of my "normie" actions.

I’d be in on an ejection port covered 737.

I’m thinking walking through blow down, or a swamp with the gun and stuff ending up in the holes

 

[YodaSends]

I am leaning towards trying an Impact action. As I’ve heard great things and I’ve also heard their 75* bolts feel lighter then the Defiance’s. I currently have a Anti 90*

I’m trying to figure out if the 6oz difference between the NBK and NBK UL is worth it.
I’m running a Pro Hunter Adjustable 1.8 pounds, Benchmark #5 spiral fluted finished at 24 , 3.5 pds and either a Mark 5 3.6-18 or Atacr 4-16.

Either action will fall between 9-10 pounds, all dressed.

If you're willing to give up FFP and go SFP, there is about 10oz to save there (Zeiss/Swaro are pretty reasonable in that class and pretty hard to throw rocks at their optical quality). So that could either offset the NBK->NBK UL savings or add to that to shave a whole pound off the rifle. Mine has a Bartlein #1 cut to 18", which would shave a few additional lbs off the rifle vs your build, but at the expense of accuracy over longer strings of fire. Still very much tight enough for my use case.


Defiance makes a great action too. Impact just has me smitten. I have barrel compatibility over all my actions from them and bolt compatibility across the short actions. (777r takes the 737r barrels but obviously not the bolt). So that made the UL NBK the default choice for my ultralight build.