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Post by wilson1968 on Jan 4, 2016 13:01:46 GMT -8
has any one tried 77 smk with the 1-9 twist. they say 1-8 is required but ive read people having luck with a 1-9
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Post by GLSHOOTER on Jan 6, 2016 6:45:22 GMT -8
has any one tried 77 smk with the 1-9 twist. they say 1-8 is required but ive read people having luck with a 1-9 I haven't seen any on the shelf here in Phoenix but I have not looked in the last two week. I it is going to be on the ragged edge but the fast BHW rifling might pull it off. I probably should buy a box but all my 22's are 1:8 from BHW and the others are 1:9 1:10 and 1:12 from other places so it really wouldn't be a telling test. Greg |
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Post by wilson1968 on Jan 6, 2016 17:56:26 GMT -8
im interested in a bolt action barrel. and have close to 800 of the 77 smk's. i feel the 1-9 twist would be the best for what i want. i just have those laying around not being used. i run a can so i dont want any problems. just was looking if any one had experiences with this combo.
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Post by GLSHOOTER on Jan 7, 2016 6:28:46 GMT -8
im interested in a bolt action barrel. and have close to 800 of the 77 smk's. i feel the 1-9 twist would be the best for what i want. i just have those laying around not being used. i run a can so i dont want any problems. just was looking if any one had experiences with this combo. I haven't seen any postings of a BHW shooting the 77's. The 1:9 normally limits itself to 69's with an 8 being needed for the 75's and up. Personally I think the 8 would be a better choice as it will shoot even the lighter bullets very well based on the ones I shoot all the time. I'll continue to look around. How would these effect a can? Greg |
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Post by wilson1968 on Jan 8, 2016 2:21:43 GMT -8
baffle strike from the bullet coming out unstablized. they say it happens. luckily never to me yet. its good to here the 1-8 does good with the lighter pills. i might have to look that direction. figured on putting together something that will shoot a majority of stuff rather than limit myself on one end of the spectrum.
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Post by GLSHOOTER on Jan 8, 2016 5:32:28 GMT -8
baffle strike from the bullet coming out unstablized. they say it happens. luckily never to me yet. its good to here the 1-8 does good with the lighter pills. i might have to look that direction. figured on putting together something that will shoot a majority of stuff rather than limit myself on one end of the spectrum. I understand the baffle strike issue. The 1:8 will show you all the versatility you seek. Greg |
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Post by gunmutt on Jan 9, 2016 17:56:35 GMT -8
I shot the 77grain Nosler CC out of my 1:8 16" BHW barrel. 1" groups. Again this was using a 1-4 Burris MTAC scope, the big dot reticle covered my POA completely so I am sure that I would have gotten better groups with a fine lined reticle. But with a 1:9 I would stick to the 68-69 grainers.
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Post by ivlianvs on Jan 20, 2016 1:27:02 GMT -8
baffle strike from the bullet coming out unstablized. they say it happens. They "say" it happens, but has anyone ever been able to verify that an unstable bullet actually caused a baffle strike, though? Instability shouldn't cause enough yaw at that short of a distance to be an issue.
Disclaimer: You should never slap a can on and fire a bullet that you haven't tested previously with that rifle. Always shoot new loads without the can first!
In regards to the 77SMK in a 1:9 barrel, my first question would by to ask why you would want to have a 1:9 in the first place when 1:8 or even 1:7 are readily available?  OK, sarcastic ribbing aside, Sierra states that you need a 1:8 to stabilize the 77gr bullets. However, bullet manufacturers will always err on the side of caution when making recommendations. If you plug the SMKs information into Berger's stability computer, it indicates that the bullet will be stable. As you have noticed, plenty of shooters have tested them in 1:9 barrels and not experienced destabilization, but at what range? What range will you be shooting at? Stability becomes more important, and evident, the longer distance that the bullet travels. What are you shooting at? Minor instability causing larger groupings might be acceptable for hunting purposes in trade for the terminal effects of a heavier bullet, but wouldn't be so useful in competition. Then again, SMK isn't exactly made with terminal effects in mind. So match your load to your intended use, and enjoy!
If you already have a 1:9 go ahead and give the 77's a shot (pun intended). However, if you are trying to decide on the barrel to get, always go with a tighter twist. The myth of over-spinning and destabilizing lighter bullets has been disproven for all but the cheapest of bullets that are so unbalanced they probably wouldn't stabilize in anything to begin with.
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Post by devildogandboy on Jan 20, 2016 3:28:15 GMT -8
i shoot the 77's out of my 8 twist with good results. the heaviest in my 9 twist is the 69 grainers, they work well. i would go with the 8 twist and be done with it!
Bruce
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Post by GLSHOOTER on Jan 20, 2016 6:46:28 GMT -8
baffle strike from the bullet coming out unstablized. they say it happens. They "say" it happens, but has anyone ever been able to verify that an unstable bullet actually caused a baffle strike, though? Instability shouldn't cause enough yaw at that short of a distance to be an issue.
Disclaimer: You should never slap a can on and fire a bullet that you haven't tested previously with that rifle. Always shoot new loads without the can first!
In regards to the 77SMK in a 1:9 barrel, my first question would by to ask why you would want to have a 1:9 in the first place when 1:8 or even 1:7 are readily available? OK, sarcastic ribbing aside, Sierra states that you need a 1:8 to stabilize the 77gr bullets. However, bullet manufacturers will always err on the side of caution when making recommendations. If you plug the SMKs information into Berger's stability computer, it indicates that the bullet will be stable. As you have noticed, plenty of shooters have tested them in 1:9 barrels and not experienced destabilization, but at what range? What range will you be shooting at? Stability becomes more important, and evident, the longer distance that the bullet travels. What are you shooting at? Minor instability causing larger groupings might be acceptable for hunting purposes in trade for the terminal effects of a heavier bullet, but wouldn't be so useful in competition. Then again, SMK isn't exactly made with terminal effects in mind. So match your load to your intended use, and enjoy!
If you already have a 1:9 go ahead and give the 77's a shot (pun intended). However, if you are trying to decide on the barrel to get, always go with a tighter twist. The myth of over-spinning and destabilizing lighter bullets has been disproven for all but the cheapest of bullets that are so unbalanced they probably wouldn't stabilize in anything to begin with.
Great post except that the last statement is not always mythical. I don't consider VMAX bullets as being cheap and blow them up shooting them in my 22X6.8 1:8 twist. When they do hit the PD's it's like an atom bomb going off. Here's a picture of one coming unglued at 3750. That day 100 rounds fired and only 97 bullet holes with half a dozen commas Changing to heavier jacketed Noslers took care of it.  Greg |
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evanh
Junior Member
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Post by evanh on Jan 20, 2016 8:09:40 GMT -8
They "say" it happens, but has anyone ever been able to verify that an unstable bullet actually caused a baffle strike, though? Instability shouldn't cause enough yaw at that short of a distance to be an issue.
Disclaimer: You should never slap a can on and fire a bullet that you haven't tested previously with that rifle. Always shoot new loads without the can first!
In regards to the 77SMK in a 1:9 barrel, my first question would by to ask why you would want to have a 1:9 in the first place when 1:8 or even 1:7 are readily available? OK, sarcastic ribbing aside, Sierra states that you need a 1:8 to stabilize the 77gr bullets. However, bullet manufacturers will always err on the side of caution when making recommendations. If you plug the SMKs information into Berger's stability computer, it indicates that the bullet will be stable. As you have noticed, plenty of shooters have tested them in 1:9 barrels and not experienced destabilization, but at what range? What range will you be shooting at? Stability becomes more important, and evident, the longer distance that the bullet travels. What are you shooting at? Minor instability causing larger groupings might be acceptable for hunting purposes in trade for the terminal effects of a heavier bullet, but wouldn't be so useful in competition. Then again, SMK isn't exactly made with terminal effects in mind. So match your load to your intended use, and enjoy!
If you already have a 1:9 go ahead and give the 77's a shot (pun intended). However, if you are trying to decide on the barrel to get, always go with a tighter twist. The myth of over-spinning and destabilizing lighter bullets has been disproven for all but the cheapest of bullets that are so unbalanced they probably wouldn't stabilize in anything to begin with.
Great post except that the last statement is not always mythical. I don't consider VMAX bullets as being cheap and blow them up shooting them in my 22X6.8 1:8 twist. When they do hit the PD's it's like an atom bomb going off. Here's a picture of one coming unglued at 3750. That day 100 rounds fired and only 97 bullet holes with half a dozen commas Changing to heavier jacketed Noslers took care of it. Greg Do you mean 3 bullets didnt make it to the paper? And also, that little comma smudge is the bullet coming apart? That's weird, neat, and unfortunate all at once. |
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Post by GLSHOOTER on Jan 20, 2016 9:41:24 GMT -8
Yep. Three blew up. That is the jacket rupturing. This is quite common on light bullets shot fast in fast twist barrels. The advent of the Swift and 22-250 introduced the phenomenon to the public. The cure on this one is back down 100 FPS, go to a heavier jacket like Sierra or Nosler or shoot a slower twist like a 1:10.
Greg
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Post by wilson1968 on Jan 23, 2016 16:56:46 GMT -8
well i made an order. 22 inch 556 1-8 for a rem short action. im sure ill be pleased. i have a 260 for an ar10 and a 7 mm mag bhw barrel and both shoot very well.
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OK, sarcastic ribbing aside, Sierra states that you need a 1:8 to stabilize the 77gr bullets. However, bullet manufacturers will always err on the side of caution when making recommendations. If you plug the SMKs information into Berger's stability computer, it indicates that the bullet will be stable. As you have noticed, plenty of shooters have tested them in 1:9 barrels and not experienced destabilization, but at what range? What range will you be shooting at? Stability becomes more important, and evident, the longer distance that the bullet travels. What are you shooting at? Minor instability causing larger groupings might be acceptable for hunting purposes in trade for the terminal effects of a heavier bullet, but wouldn't be so useful in competition. Then again, SMK isn't exactly made with terminal effects in mind. So match your load to your intended use, and enjoy! 