FX Impact (30 Cal) and Nielsen Slugs

Forums Pellets, Projectiles, Slugs, & Ammo FX Impact (30 Cal) and Nielsen Slugs

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    beekay
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    Anyone have experience with this ammo in this gun. Does it need a slug liner? Can magazine take the slug? thanks

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    heavy-impact
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    I've shot them in my Impact X 700mm.

    Magazines can take the Nielsen 47gn hp. Feeding was good. Groups were around 3 x larger than JSB pellets for me.

    The 51.2gn hp (in my avatar) cast by Loren does better at around 2 x the group size of JSB pellets. They need to be sorted by weight though. I shoot them at 950 fps with power mods.

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    Loren
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    I have tried a bunch of different cast bullets in a .30 STX 700mm barrel.  From my observations the barrel require some very precise sizing of bullets.  I think this is because of the method FX is using the rifle the barrels.  The rifling is just very shallow, so allows little to no margin in sizing.  diabolo pellets have such a oversized skirt which makes them very forgiving for the sizing…IMHO.  

    I suspect this is why there has been such a delay with FX having their slug barrels on the market.  They are just to darn finicky on projectile sizing.. 

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    heavy-impact
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    Loren

    I have tried a bunch of different cast bullets in a .30 STX 700mm barrel.  From my observations the barrel require some very precise sizing of bullets.  I think this is because of the method FX is using the rifle the barrels.  The rifling is just very shallow, so allows little to no margin in sizing.  diabolo pellets have such a oversized skirt which makes them very forgiving for the sizing…IMHO.  

    I suspect this is why there has been such a delay with FX having their slug barrels on the market.  They are just to darn finicky on projectile sizing.. 

    When I shoot your hollowpoints at 60 yds I get 3 or 4 in a group as tight as pellets and then a flier about an inch and a half out. I wonder what causes that? The point of impact is the same as 50gn JSBs.

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    Loren
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    I see the same thing and that is with very close inspection and weigh sorting.  I thing that the sizing is just on the knife edge for the rifling.   I have gone up and down on sizing dies and with worse results, so that is why I say that.

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    Almeidaken
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    FX Slug X .22 barrels do really well with .22 NSA. I would advise using pellets in your smooth twist.30 FX, because the barrel won't accept the slugs, no matter how good you size them. the reason being the twist rate and lack of pressure seal at the end of the slug. 

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    heavy-impact
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    Almeidaken

    FX Slug X .22 barrels do really well with .22 NSA. I would advise using pellets in your smooth twist.30 FX, because the barrel won't accept the slugs, no matter how good you size them. the reason being the twist rate and lack of pressure seal at the end of the slug. 

    The STX twist rate of 1 in 14 is correct for the weight of these projectiles and they seal equally well giving the same velocity per weight as a pellet and the same point of impact. I think the main problem is the choke. STX barrels are rifled full length. While these cast bullets are not as accurate and consistent as JSB pellets, every one I've fired would have been a kill shot within 70 yards. 1/2 inch groups are great but 1 1/2 inch groups are still good for hunting.

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    Almeidaken
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    Yeah, the choke has to work really hard to size the projectile down. And the kill shot equation for .30 cal at 70 yards is perfect. 

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    ackuric
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    Getting slugs to shoot out of an airgun as accurately as diablo pellets…good luck…and when the magic combo for barrel twist + slugs sized perfectly + enough air to push them well ect…you're looking at a rare gem that is a PITA to produce perfect repeatable results with…trust me. You won't see a FX slug shooter out performing diablo's in the accuracy department… Its 2019 and slugs aren't new technology, in fact its older than diablo pellets…and diablo pellets were invented for a reason and have been our main choice for ammo as airgunners for a very good reason…

     

    Some people don't seem to understand slugs are VERY spin stabilized, the most accurate rifles on this planet are shooting slugs @ 3,000-4,000 FPS…can we get subpar accuracy in comparison to those rifles with slugs @ Sub sonic velocities? Sure…but are you going to compete at their level, or even in 10m competition conditions against wadcutters? Likely not…Just my 2c

    Once we develop air rifles that hit 2k+ fps with ease, then the concept of slug use as a projectile will make more sense…to ME at least.

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    heavy-impact
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    ackuric

    Getting slugs to shoot out of an airgun as accurately as diablo pellets…good luck…and when the magic combo for barrel twist + slugs sized perfectly + enough air to push them well ect…you're looking at a rare gem that is a PITA to produce perfect repeatable results with…trust me. You won't see a FX slug shooter out performing diablo's in the accuracy department… Its 2019 and slugs aren't new technology, in fact its older than diablo pellets…and diablo pellets were invented for a reason and have been our main choice for ammo as airgunners for a very good reason…

     

    Some people don't seem to understand slugs are VERY spin stabilized, the most accurate rifles on this planet are shooting slugs @ 3,000-4,000 FPS…can we get subpar accuracy in comparison to those rifles with slugs @ Sub sonic velocities? Sure…but are you going to compete at their level, or even in 10m competition conditions against wadcutters? Likely not…Just my 2c

    Once we develop air rifles that hit 2k+ fps with ease, then the concept of slug use as a projectile will make more sense…to ME at least.

    For 30 years before I bought an airgun I shot .22 rimfire CBs. A 29 grain round nose at 720 fps. They shot very well and had about the same report as a kernel of corn popping. The same custom Marlin bolt action that I shot those in could put 5 CCI 40 grain hp in quarter size groups at 100 yards if the air was calm. I never chronographed them but it was probably 1250 fps from a 20 inch barrel. There's nothing magic about it. You can have excellent accuracy from slugs/bullets at any velocity. Whether they reach their speed with smokeless powder or compressed air shouldn't matter.

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    ackuric
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    heavy-impact

    ackuric

    Getting slugs to shoot out of an airgun as accurately as diablo pellets…good luck…and when the magic combo for barrel twist + slugs sized perfectly + enough air to push them well ect…you're looking at a rare gem that is a PITA to produce perfect repeatable results with…trust me. You won't see a FX slug shooter out performing diablo's in the accuracy department… Its 2019 and slugs aren't new technology, in fact its older than diablo pellets…and diablo pellets were invented for a reason and have been our main choice for ammo as airgunners for a very good reason…

     

    Some people don't seem to understand slugs are VERY spin stabilized, the most accurate rifles on this planet are shooting slugs @ 3,000-4,000 FPS…can we get subpar accuracy in comparison to those rifles with slugs @ Sub sonic velocities? Sure…but are you going to compete at their level, or even in 10m competition conditions against wadcutters? Likely not…Just my 2c

    Once we develop air rifles that hit 2k+ fps with ease, then the concept of slug use as a projectile will make more sense…to ME at least.

    For 30 years before I bought an airgun I shot .22 rimfire CBs. A 29 grain round nose at 720 fps. They shot very well and had about the same report as a kernel of corn popping. The same custom Marlin bolt action that I shot those in could put 5 CCI 40 grain hp in quarter size groups at 100 yards if the air was calm. I never chronographed them but it was probably 1250 fps from a 20 inch barrel. There's nothing magic about it. You can have excellent accuracy from slugs/bullets at any velocity. Whether they reach their speed with smokeless powder or compressed air shouldn't matter.

     

    Shooting subsonic rounds is a joke in comparison to super sonic rounds that stay above transonic range…just do your own research I' not going to argue.

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    heavy-impact
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    ackuric

     

    Shooting subsonic rounds is a joke in comparison to super sonic rounds that stay above transonic range…just do your own research I' not going to argue.

    I never intended an argument, I'm citing actual experience. We're on an airgun forum discussing airgun capabilities and I don't think anyone here has the goal of competing against the worlds most accurate powder burners at hundreds of yards. Lighten up my friend, we're hunting small game.

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    nielsenammo
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    Manufacturer

    I would agree that diabolo pellets are more accurate at closer ranges.  Pellets are always going to be the major role player in ammo for the foreseeable future.  Slugs do outperform pellets at long ranges say past 100 yards.  That does not mean any slug will outperform any pellet.

    Slugs are more picky about what barrel they will shoot out of.  Sizing is crucial to the performance of the slug.  Slugs way out perform pellets in wind drift and drop because of the BC advantage they have.  If you are shooting longer ranges, like past 100 yards, I think the slugs outperform pellets.  Inside of 100 yards, especially in calm winds, pellets are pretty tough to beat.

    I don't think either one you choose is better or worse, there are different situations where one is a better choice over the other.  If you shoot 50 yards at squirrels, pellets will perform wonderful and those close ranges the wind will not move your pellet that much.  If you shoot 100 yards or further, especially with wind, I personally prefer slugs over pellets but to each their own.  If I am shooting 75 yard competition I would use a diabolo pellet for most guns.

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    Bob_O
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    Thank you heavy and Nick!

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    heavy-impact
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    nielsenammo

    I would agree that diabolo pellets are more accurate at closer ranges.  Pellets are always going to be the major role player in ammo for the foreseeable future.  Slugs do outperform pellets at long ranges say past 100 yards.  That does not mean any slug will outperform any pellet.

    Slugs are more picky about what barrel they will shoot out of.  Sizing is crucial to the performance of the slug.  Slugs way out perform pellets in wind drift and drop because of the BC advantage they have.  If you are shooting longer ranges, like past 100 yards, I think the slugs outperform pellets.  Inside of 100 yards, especially in calm winds, pellets are pretty tough to beat.

    I don't think either one you choose is better or worse, there are different situations where one is a better choice over the other.  If you shoot 50 yards at squirrels, pellets will perform wonderful and those close ranges the wind will not move your pellet that much.  If you shoot 100 yards or further, especially with wind, I personally prefer slugs over pellets but to each their own.  If I am shooting 75 yard competition I would use a diabolo pellet for most guns.

    I like the Bob's Boattails flying ashtray in my avatar for expansion. Loren milled the boattail portion off the mold so they would feed properly in an Impact and fit the magazine. I shoot JSB pellets mostly and rarely shoot 100yds.

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    JamesD.
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    Anyone know where I can find 40-60 grain .299 slugs? Or a sizer for any slug that's very close to .299"?

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    heavy-impact
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    JamesD.

    Anyone know where I can find 40-60 grain .299 slugs? Or a sizer for any slug that's very close to .299"?

    http://noebulletmolds.com/NV/index.php?cPath=564_104_413

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    cajunvol
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    I know where you can get dead on die for .30.  gmi

    I ordered one to experiment with but already nervous it is going to be a bit big to play with on impact barrel.  We'll see when it arrives I guess.

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