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Post by outlaw76 on Oct 24, 2016 21:19:03 GMT -5
Just wanted to get some input. I have some 275 grain accumax bullets and was just wondering do these bullets like a loser fit in barrel like the BE and eMax or do you they like a little tighter like match hunters ?I know the bullets are in between for jacket thickness just was seeing what you guys think from your results.
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Post by Kyle on Oct 24, 2016 21:23:53 GMT -5
On the loose side tends to produce the best groups. One hand of pressure is about the best way I can describe the seating resistance. If you have to lean on it to get it down the bore it's too big.
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Post by Richard on Oct 25, 2016 15:58:09 GMT -5
+1
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Post by nyhunter on Oct 29, 2016 15:46:57 GMT -5
As Kyle stated loose seems to work best.
I was working up a load and was all over the place so I called Kyle and he told me the same thing.
I was always under the impression that tighter was better, well I was wrong in this case.
Once I sized the Accumax 275's smaller my group size reduced considerably.
I also started cronographing the results and noticed I was having extreme speed variations, Kyle also had suggested that I use a veggie wad.
The smaller resizing and veggie wads did the trick for me, gun started shooting sub-moa groups.
Hope this helps.
Good luck.
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Post by Ice on Oct 29, 2016 16:22:16 GMT -5
If the loose fit works best, then is there a possibility that in a hunting situation that sharp jar of the rifle could cause the bullet to "unseat" resulting in ignition problems/pressure?
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Post by Kyle on Oct 29, 2016 17:17:37 GMT -5
If the loose fit works best, then is there a possibility that in a hunting situation that sharp jar of the rifle could cause the bullet to "unseat" resulting in ignition problems/pressure? I don't think that should be an issue unless maybe the gun was dropped or abused. Under normal hunting conditions the resistance we are describing, the bullet shouldn't move. One could prove this by using a witness mark on their ramrod and checking the bullet seat in the field. I have done this myself and have seen no dislodging of the bullet. |
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Post by Kyle on Oct 29, 2016 17:28:04 GMT -5
As Kyle stated loose seems to work best. I was working up a load and was all over the place so I called Kyle and he told me the same thing. I was always under the impression that tighter was better, well I was wrong in this case. Once I sized the Accumax 275's smaller my group size reduced considerably. I also started cronographing the results and noticed I was having extreme speed variations, Kyle also had suggested that I use a veggie wad. The smaller resizing and veggie wads did the trick for me, gun started shooting sub-moa groups. Hope this helps. Good luck. Not every muzzleloader is the same. The fun part is shooting to find what each individual gun likes. Chronographing each shot during load development and comparing ES's with and without a wad will help to find what works for you. |
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Post by Richard on Oct 29, 2016 18:40:54 GMT -5
I have been shooting Kyle's bullets with a semi-loose fit (you can feel it going down the bore - not free falling) and no wad with low ES's and tight groups. Much of this depends on your barrel, ignition system, duplex vs single, what powder and how much?
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Post by Ice on Oct 30, 2016 16:17:29 GMT -5
If the loose fit works best, then is there a possibility that in a hunting situation that sharp jar of the rifle could cause the bullet to "unseat" resulting in ignition problems/pressure? I don't think that should be an issue unless maybe the gun was dropped or abused. Under normal hunting conditions the resistance we are describing, the bullet shouldn't move. One could prove this by using a witness mark on their ramrod and checking the bullet seat in the field. I have done this myself and have seen no dislodging of the bullet. Thanks |
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Post by thunder53 on Oct 31, 2016 22:17:42 GMT -5
So with a 275 gr bullet using IMR4198 in a 700 ML PacNor, what do you feel the powder max is??
With a 300 gr bullet I've limited it to 70 gr IMR4198.
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Post by Richard on Nov 1, 2016 5:01:10 GMT -5
It could depend on how "fat" your barrel is in the area of the highest pressure? Just saying PN means nothing.......it is how much steel is there to contain the pressure. If you are interested in high velocities, it pays to have a barrel that is at least 1.2" to 1.250" for at least five inches at the breech end. What is a safe load in my barrel, might not be in yours? Sendero contours are typically bad for high pressure loads due to the lack of steel. And most of this worry comes when a rifle is double loaded? I would bet that if my recent mishap occurred with a Sendero taper, that the barrel would have come apart as the pressure would have been where the barrel was thin.
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Post by thunder53 on Nov 1, 2016 22:27:32 GMT -5
It could depend on how "fat" your barrel is in the area of the highest pressure? Just saying PN means nothing.......it is how much steel is there to contain the pressure. If you are interested in high velocities, it pays to have a barrel that is at least 1.2" to 1.250" for at least five inches at the breech end. What is a safe load in my barrel, might not be in yours? Sendero contours are typically bad for high pressure loads due to the lack of steel. And most of this worry comes when a rifle is double loaded? I would bet that if my recent mishap occurred with a Sendero taper, that the barrel would have come apart as the pressure would have been where the barrel was thin. PacNor Sendero Contour 25" 1-22" twist barrel, don't know shank. |
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Post by claydawg on Nov 2, 2016 14:16:33 GMT -5
If you're shooting 300 grain bullets with 70 grains of Imr4198 with no pressure signs, you could work your way up to 73 grains with no problems based on the trace data I've been using.
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