What Diameter Slugs for Impact M3 .22?

[Colorado_CJ]

Looking to get some slugs for my Impact M3 Compact in .22. I don't know what the best diameter to order is though.

I have some NSA 20.2 gr .216" slugs for my Veteran, but they don't shoot well out of the M3 compact. Think I need .217 or .218.

What have you found to be the best size for the stock Superior STX liner?

 

[orion]

I'm using with the Maverick the NSA 23gr 218

Give those a try and see, they are grouping very nice 

 

[kiba]

The superior heavy liner in my M3 grouped the .217s and .218s very well at 50y, but at 100y the .217 opened way up while the .218s grouped tight. I tried 24.8, 27.5, and 28.5 in .217 and .218 and the .218 27.5 was the obvious winner.

I just received some .2175 to test against the .218 at 100y. Not sure why I'm bothering, the .218s shoot fantastic... but I want to know what's best before placing a big bulk order.

Edit: tested the .2175s. Same velocity as the .218s, grouped the same as the .218 at 50y, and at 100y+ while the .2175 were far more accurate than the .217s the .218s were still the clear winner in the accuracy department. I'll be placing a large order for more .218s.

 

[hussn32]

.218 head all day in the superior liner. They are just a touch slower, but more accurate. I use nsa 23 and 24.8 grain and both shoot excellent 

 

[2L8]

So far the .2165 and .217 are shooting very well in NSA 27.5, having the .2165 at a slight advantage shooting @ 957 out of the Maverick. Have both NSA 28.5 and 31.5 in .217 on the way to test @ similar FPS. Tuning will be mandatory.

Patrick

 

[yenniedn]

My M3 600mm 0.22 does very well with the 24.8g 218 NSA's.

 

[GRYAN128]

I've had really good results with .217 KnockOuts through a 600mm Superior.

 

[Rallyshark]

I'm going to have to agree with most of these guys. I've had the best results with .218 myself.

 

[qball]

Interesting, had no issues even at 165 yards with .217 but only in lighter 23 grain slugs. Will try .217 with my new heavy liner soon. 



Also with short 500mm barrel it's very important to tune the gun with minimal muzzle blast as it will reduce accuracy. 

 

[Sous]

.2175 work great here

 

[111]

Save you money & try the AVS 217 32G Dish base or the 218.3 34 G Dish 30. Cal use the 3013 51G Dish base. I wasted so much money testing slugs & wish someone would of gave more this info. I have the Impact heavy barrels & I shot them at 975 to 980 fps. I set every to max & then adjust the reg to get 1000 FPS. Then I lower the hammer spring set at #8 ( M-3 ) with the little wheel until I get it down to 987 to 990. Then I turn the bumper in until I get it down to 977 fps. That way every thing is working & doing there job set to a lower reg pressure.