Gonna get a 600 .25 cal slug liner. I need slugs to go with it..there is 29gr, 33.5gr, 36.2gr, 38.5gr. I wish I got the money to try all. But I need to pay credit cards and fix my car too. So I dont want to spend that much since I still have to get the slug line too. So which would work best for the 600mm 25 cal? Gun is the fx impact. I will be chosing 2 of the best. Thanks.
Slug weight. Which to choose? .25 cal
- Thread starter 2fast2furious
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My local shooting buddy has been slug testing in his 700mm impact. From all the advice he received, it seems like you are best off with the lighter slugs with flat base and hollow points. I’d definitely go with the 29’s and 33.5’s. Good luck!
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I thought heavier is better against the wind, no? I was thinking at least 36.5 or 38.5. If more people say go lighten guess I will try lighter slugs. Right now I'm shooting jsb and I'm shooting the king heavy 33.9gr mk2.
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Heavier has nothing to do with beating the wind, it’s all about the ballistic coefficient. Although those heavier slugs do have a better bc than the ones I mentioned, I recommended those weights because they are the ones people seem to be having the most luck in getting to shoot well.
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The 29 seem to shoot best at 930 FPS . When you get to that speed make small adjustments. You can’t do this without a chronograph I’m going to try the 33,5 next.
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When shooting slugs out of an fx slug liner it's best to go with the lighter slugs in the shooter barrels. This is due in fact that the heavier slugs need a faster spin rate to stabilize and the shorter barrels do not achieve that spin rate. I have shot the 32 gr slugs from NSA out of the 25 cal gauntlet at 920 fps and that has been a good success. I am getting sub moa at a 100 yards.
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I have a chrony. I'm shooting jsb heavy mk2 at 890-900fps. So I'm guessing 29gr slug will go 930-950. Might give 29gr and 33.5 a try first. Maybe when have the money, will give the heavier slugs a try.
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Barrel length has nothing to do with spin rate? Hopefully once the slug liner B comes out we can start using the big boys (that 55.5 nielson in particular!)
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TNT19 is correct.
The 700mm barrel has a slightly different twist rate (than the 600mm) as the presumption FX has made is that you will be shooting perhaps longer (heavier) slugs faster because of the extra power available. It’s not just weight it’s the overall length of the slug you need to consider and which determines twist rate. A dish base can give you a little more OAL and not increase the weight. This enables you to still push them fast enough to get them stable. I’d try Nicks new 29g with the dish base and the 33.5 with the flat base. The diameter is also crucial. I have found sizing die can work really well in getting just the right diameter. Good luck Michael
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As you can see here as the liner gets longer you will presumably have more power to shoot longer and heavier slugs and faster. So with each step up in length there is a change in the twist rate. 
The 500mm has the quickest twist rate to help at low power to stabilise the slug ect.
The 500mm has the quickest twist rate to help at low power to stabilise the slug ect.
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For .25 in 600mm I’d get the lightest ones available. You didn’t mention if you’re using these for hunting or just long range targets because there’s a big difference.
Many say you must shoot at 900-950fps area of speed. For full expansion yes that would help but; I’ve gotten low power guns to shoot slugs accurately at 200 yards in the 750-850fps area. Yes, there’s a lot of drop but there’s no doubt they carry more energy to target compared to Diabolos.
I’m probably in worse shape than you so I’m just waiting for everyone else to test all combinations in all guns. I have 2 narrowed down to can’t ask for better. Good luck.
Many say you must shoot at 900-950fps area of speed. For full expansion yes that would help but; I’ve gotten low power guns to shoot slugs accurately at 200 yards in the 750-850fps area. Yes, there’s a lot of drop but there’s no doubt they carry more energy to target compared to Diabolos.
I’m probably in worse shape than you so I’m just waiting for everyone else to test all combinations in all guns. I have 2 narrowed down to can’t ask for better. Good luck.
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What’s driving me nuts is the inconsistency. I’ll have a good group going and then one will blow out of the group by an inch. Or I’ll have two in the same hole and the two more in a hole high and right.
This makes me think there is something “off” with the slugs but they appear to be beautifully made
some one mentioned sizing. Can you elaborate on that. What you do and how
This makes me think there is something “off” with the slugs but they appear to be beautifully made
some one mentioned sizing. Can you elaborate on that. What you do and how
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Less than a .001 inches can make all the difference so sizing the slugs works. I’ve only just worked this out sizing some .218 slugs down and really tightening up th groups. In my case there was not much resistance pushing the slugs through the die but it really worked well.
http://noebulletmolds.com/NV/index.php?cPath=564_104_412
In .25 I have 5 dies starting at -251 going down in size. Use the push rod at the bottom of the page to push the slug through the die. I clean them again after doing it. There is more info and more experienced on the forum if you search.
Michael
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If I were choosing I'd go with a single hollow point & 34gr dimple nose. 33.5 hp. That 29gr is .249, with the slug liner that may cause issues, and it being new, if I had to start with only 2, keep them both .250. The 34gr dimple works great in the wind.
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Before/when you order any slugs for the new barrel, ask the barrel maker what diameter slugs you should use in THAT particular liner. A lot of factors enter in to what makes a particular diameter/weight slug work best in a specific barrel. The maker should also be able to recommend a general idea of what weight slugs will work best in that specific barrel. Be careful here...the guy selling the liner may not be the guy making the liner, so his opinion is just that...his opinion.
Personal results are always a better indicator than all the sage technical advice you can get. When the slug liner arrives, you should already know the exact diameter slug to use, and a general idea of what weight is recommended for that barrel length. See if you can get a "sampler pak" from one of the slug producers. Then simply trial and error to see if one outperforms the others.
There is no exact answer to your question, unless someone else has that exact barrel on the same gun as you own. Otherwise, any advice must be considered as "generally/technically true", but perhaps not to the extent you want for your personal setup.
As usual, "Advice" is not a guarantee of results. Only you can get the exact information that will give you repeatable results shot after shot.
Regards,
Kindly Ol' Uncle Hoot
(Any information enclosed is not guaranteed, your mileage may vary)
Personal results are always a better indicator than all the sage technical advice you can get. When the slug liner arrives, you should already know the exact diameter slug to use, and a general idea of what weight is recommended for that barrel length. See if you can get a "sampler pak" from one of the slug producers. Then simply trial and error to see if one outperforms the others.
There is no exact answer to your question, unless someone else has that exact barrel on the same gun as you own. Otherwise, any advice must be considered as "generally/technically true", but perhaps not to the extent you want for your personal setup.
As usual, "Advice" is not a guarantee of results. Only you can get the exact information that will give you repeatable results shot after shot.
Regards,
Kindly Ol' Uncle Hoot
(Any information enclosed is not guaranteed, your mileage may vary)
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Slug liner is made by fx. I guess I could ask fx. They should have tested their barrels and know which slugs type works best for their liners.
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For an FX slug liner, stick with the flat base slugs. The slugs with a diameter of .250” shoot best in the FX slug liners. For a 600mm liner I would stick to the lighter slugs.
On the other hand, my RAW likes the .249” slugs with a dish base in the 26gr-32gr. range but it also shoots .250” slugs well.
Others have recommended the dimple nose slugs, they haven’t worked well for me, but if they work for others, maybe you should give them a try. In my experience, there are many others that are much easier to tune and are more accurate.
There are also many lighter slugs on the way with both a dish base and flat base, they’ll be perfect for you. I’m not allowed to divulged their weights yet, Nick will let you know when it's time.
With all of that said, keep in my that some barrels shoot slugs better than others and some slugs shoot in a variety of guns better than others. I don’t like dimple nosed slugs but that doesn’t mean they won’t work for you, obviously some people like them. Some of the slugs I love and recommend may shoot terrible for you. Slugs rarely just work perfectly right off the bat. They really need to be tested and the gun tuned for them. With each slug I test, I shoot it to see what I think and then I start testing in the mid 850fps range and keep testing up to around 980fps or so to see what velocity the slug likes with my gun. I fine tune it from there. I have found that with the FX slug liners, the flat base slugs work best but I have also shot the 29gr Nielsen out of my Impact and it shot well. It’s both .249” and a dish base which contradicts what we’ve told you FX gun’s like. That’s why it’s so important to test as many as you can, you just never know what ones will shoot well until you try them out! I hope this helps a little. Good luck!
Stoti
On the other hand, my RAW likes the .249” slugs with a dish base in the 26gr-32gr. range but it also shoots .250” slugs well.
Others have recommended the dimple nose slugs, they haven’t worked well for me, but if they work for others, maybe you should give them a try. In my experience, there are many others that are much easier to tune and are more accurate.
There are also many lighter slugs on the way with both a dish base and flat base, they’ll be perfect for you. I’m not allowed to divulged their weights yet, Nick will let you know when it's time.
With all of that said, keep in my that some barrels shoot slugs better than others and some slugs shoot in a variety of guns better than others. I don’t like dimple nosed slugs but that doesn’t mean they won’t work for you, obviously some people like them. Some of the slugs I love and recommend may shoot terrible for you. Slugs rarely just work perfectly right off the bat. They really need to be tested and the gun tuned for them. With each slug I test, I shoot it to see what I think and then I start testing in the mid 850fps range and keep testing up to around 980fps or so to see what velocity the slug likes with my gun. I fine tune it from there. I have found that with the FX slug liners, the flat base slugs work best but I have also shot the 29gr Nielsen out of my Impact and it shot well. It’s both .249” and a dish base which contradicts what we’ve told you FX gun’s like. That’s why it’s so important to test as many as you can, you just never know what ones will shoot well until you try them out! I hope this helps a little. Good luck!
Stoti
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I am an old rookie with a RAW. Using Nielsen 33.5 slugs, I get good groups at 25, 50 and 75 yards but at 100 yards groups are terrible. Wind is not the cause. Have adjusted the hammer spring in both directions and did not get improvement. Suggestions will be appreciated.
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What velocity are you getting? What are “good groups” at 50 and 75? Also, do you know where your reg. is set or how fast you can shoot the JSB 33.95? Trying to get a baseline for your settings.
The 33.5gr shoots pretty well out of the RAW but if I was you I’d buy some of Nielsen’s new 29gr. They are cheap and super accurate out of my RAW, probably the best yet out of any I’ve tested. Really, they’re that good.
Stoti
The 33.5gr shoots pretty well out of the RAW but if I was you I’d buy some of Nielsen’s new 29gr. They are cheap and super accurate out of my RAW, probably the best yet out of any I’ve tested. Really, they’re that good.
Stoti
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