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Post by elkstalkr on Sept 9, 2019 9:55:47 GMT -5
So I've been shooting the exact same load outta my 45 conversion for years with no problems and all the sudden this year its blowing the sabot apart! Any ideas what could be causing this?
Just shooting a boring old load. 200 grain hornady sst with a light blue harvestor sabot and 35 grains of 5744. For the life of me I cant figure out why all the sudden my gun has started doing this! Any thoughts or ideas are appreciated.
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Post by dannoboone on Sept 9, 2019 11:31:26 GMT -5
Assuming you are using the same sabots and the manufacturer
has not changed sabot material, I would suspect either carbon
or plastic buildup in the bore, or perhaps a combination of
the two. Are you allowing the barrel to cool between shots?
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Post by elkstalkr on Sept 9, 2019 15:39:05 GMT -5
So i literally just cleaned the bore before this issue started occurring. I am not letting it cool however it’s never had any issue before not allowing it to cool. AND this is happening from the very first round. Cold bore issue.
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Post by ET on Sept 9, 2019 17:44:16 GMT -5
So i literally just cleaned the bore before this issue started occurring. I am not letting it cool however it’s never had any issue before not allowing it to cool. AND this is happening from the very first round. Cold bore issue. First I would clean the bore and run a bullet/sabot through it to check lands condition. If lands produce straight defined lines (no jagged line) on sabot then this would rule out any bore problem. Is this a new batch start of 200gr SST? Ed |
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Post by reloader22 on Sept 9, 2019 18:39:26 GMT -5
Brittle sabots?
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Post by elkstalkr on Sept 9, 2019 19:24:16 GMT -5
Maybe? Do sabots get old? Not sure how long I have had this batch. Maybe a few years. |
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Post by elkstalkr on Sept 9, 2019 19:35:39 GMT -5
I should mention out of 7 rounds I fired 2 shots did not have blown sabots and hit my bullseye. So it’s like it’s inconsistently doing it.
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Post by ET on Sept 9, 2019 19:40:19 GMT -5
Maybe? Do sabots get old? Not sure how long I have had this batch. Maybe a few years. I have sabots stored over 6-yrs and no issues. Ed |
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Post by AJ on Sept 9, 2019 19:52:21 GMT -5
Sabots are cheap, get a new supply and test again. I would clean the barrel thoroughly with a bronze brush prior to the retest.
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Post by pposey on Sept 9, 2019 22:10:43 GMT -5
Did you change primers
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Post by elkstalkr on Sept 10, 2019 9:36:44 GMT -5
So I back my charge down to 34 grains and that seems to have solved the issue. Not sure why all of the the sudden 35 is blowing sabots. Maybe external factors? But pretty sure I fired in these conditions before. Maybe my barrel isn’t as clean as I thought?
Any recommendations on what solvent I should be using to clean with? Anything that removes plastic specifically?
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Post by elkstalkr on Sept 10, 2019 9:37:15 GMT -5
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Post by mrbuck on Sept 10, 2019 11:31:33 GMT -5
Brownells has has a Shotgun Wad Solvent and a Sabot Solvent . I have used both and both work equally as well .
Chris
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Post by cuda on Sept 10, 2019 13:09:05 GMT -5
If it is hot out you will blow them faster. Sabots like it cold out when shooting.
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Post by smokepolehall on Sept 10, 2019 16:47:58 GMT -5
Yes sabots like to be cool n dry in this bad heat, does not take much to get them blowing out on you. I shoot mine in the mornings n wait 20 min between shots. Unless i have my cooling rod out at the table with me. I also help mine by putting a wad under them over the powder charge
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Post by thelongrider on Sept 11, 2019 9:40:14 GMT -5
When you say blowing sabots apart, do you mean blowing the pedals off or does the sabot look like a bunch of spaghetti strands? It sounds like old sabots to me, maybe exposed to heat or sun. Years back when I would blow a sabot every once in a while using 66 gr. of VV-N120 powder and a Barnes 195 expander bullet @ 3000 fps. I started using a wool wad under the sabot and I never had another blown sabot.
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Post by edge on Sept 11, 2019 10:27:06 GMT -5
Sun ( UV light ) is the worst thing for most plastics.
Exterior plastics have additives to protect it, I doubt that sabots do.
Sabots should to be stored away from light if you want to keep them for years.
edge.
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Post by elkstalkr on Sept 11, 2019 21:09:49 GMT -5
They have been stored in a sealed ammo can in my basement.
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Post by dannoboone on Sept 12, 2019 10:51:01 GMT -5
Brownells has has a Shotgun Wad Solvent and a Sabot Solvent . I have used both and both work equally as well . Chris Pretty sure they are one and the same in different labeled jars. Good stuff, though. |
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Post by DBinNY on Sept 13, 2019 16:17:06 GMT -5
You using a vent liner? Might change that.
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Post by elkstalkr on Sept 13, 2019 22:34:31 GMT -5
Tried both my Carbide bushing plug and vent liner plug with new vent liner. Same result.
I’ve got it sighted in now for deer season by simply backing the charge off to 34 grains. Next year I’ll play with it some more when I have time and see if I can get it shooting 35 grains again well.
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Post by tar12 on Sept 21, 2019 3:35:26 GMT -5
I would get a fresh batch of sabots...they can and will degrade...you should not be even close to blowing sabots with 35 grns of 5744...What are your sabots looking like? Missing petals or mangled and melted?
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Post by elkstalkr on Sept 23, 2019 11:18:36 GMT -5
I would get a fresh batch of sabots...they can and will degrade...you should not be even close to blowing sabots with 35 grns of 5744...What are your sabots looking like? Missing petals or mangled and melted? There is a picture of the sabots. They are melted and mangled. |
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Post by mrbuck on Sept 23, 2019 16:59:35 GMT -5
That is as blown as they get !
Chris
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Post by ET on Sept 23, 2019 17:35:09 GMT -5
Those sabots appeared to be hole punched by the bullet. That would explain how the hot gases are getting at the sabot petals.
Ed
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Post by tar12 on Sept 23, 2019 18:26:34 GMT -5
I would get a fresh batch of sabots...they can and will degrade...you should not be even close to blowing sabots with 35 grns of 5744...What are your sabots looking like? Missing petals or mangled and melted? There is a picture of the sabots. They are melted and mangled. Are you using the same batch of bullets? The reason i ask is that at one point in time some of us experienced issues with the base of some 195s...and it caused some issues... |
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Post by lwh723 on Sept 23, 2019 22:27:05 GMT -5
what temp are you shooting in? I think I had to drop down to more like 30gr of 5744 to get it to not shred sabots in the summer. But that was like 10 years ago, so I don't remember for sure.
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Post by edge on Sept 24, 2019 9:26:02 GMT -5
So i literally just cleaned the bore before this issue started occurring. SNIP. Too loose, a very light knurl until your bore fouls back to normal would be my bet. With 5744 it should not take too long. You are using a very fast powder, and the sabot gets moving before the bullet does, and it drills a hole through the sabot. edge. IMO  |
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Post by ET on Sept 24, 2019 11:24:48 GMT -5
Back in the day, chuckle, it was discovered the base radius of the 200SST was changed that produced less flat area for sabot support. Just happen to have a sample of each. Don't remember if a solution was ever reached to reduce the affect of having a smaller base surface area.  |
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Post by elkstalkr on Sept 24, 2019 12:33:18 GMT -5
So i literally just cleaned the bore before this issue started occurring. SNIP. Too loose, a very light knurl until your bore fouls back to normal would be my bet. With 5744 it should not take too long. You are using a very fast powder, and the sabot gets moving before the bullet does, and it drills a hole through the sabot. edge. IMO Hmmm. This might make the most sense! As it seemed to be loading looser than usual. However all good information here and I appreciate the comments. I am 99% sure it was the same batch of bullets, but when I get home I'll double check them! As for the temperature it wasn't any hotter out than what I had previously fired this gun in without issues. |
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