Robert heatterich
Member
- Mar 23, 2016
- 63
Been following this,any outcome?
Can a .270 Tumble?
- Thread starter MDB270
- Start date
The #1 community for Gun Owners of the Northeast
Member Benefits:
No ad networks! Discuss all aspects of firearm ownership Discuss anti-gun legislation Buy, sell, and trade in the classified section Chat with Local gun shops, ranges, trainers & other businesses Discover free outdoor shooting areas View up to date on firearm-related events Share photos & video with other members ...and so much more!
Member Benefits:
rcreynolds
Member
- Nov 4, 2015
- 65
Tumbling 270
I had a 7x57 do this, commercial ammo through a military mauser- grouped like 20 foot circle at fifty yards; less accurate than a rock toss. I threw out the ammo, cheap gun show stuff, and went with a lighter, faster bullet and no prob any more. However, I was reading a 270 can chamber and fired in a 30-06.... as another person here mentioned. I'll bet this is your problem.
I had a 7x57 do this, commercial ammo through a military mauser- grouped like 20 foot circle at fifty yards; less accurate than a rock toss. I threw out the ammo, cheap gun show stuff, and went with a lighter, faster bullet and no prob any more. However, I was reading a 270 can chamber and fired in a 30-06.... as another person here mentioned. I'll bet this is your problem.
ralph.mclean
GOC (Grumpy Old Cop)
You have a problem.
Find a reputable gunsmith and have him give the rifle a thorough going-over...
Find a reputable gunsmith and have him give the rifle a thorough going-over...
Stop shooting that rifle. Look at the Franklin Armory Reformation. It shoots rifle ammo out of a smooth bore, 7.5 inch barrel and the rouns barely begin to tumble at 25 yards. This has nothing to do with the brand or weight of the projectiles that you are shooting. There's something severely wrong with your barrel.
- May 5, 2010
- 6,588
I have seen that happen with a standard twist rate .308 barrel trying to shoot heavy subsonics.
Glad we tested it before trying to use a suppressor. All rounds at 25 yards looked like this.
I know nothing about .270 though
Doco Overboard
Ultimate Member
Maybe the inside of the bore has stuff that look like this inside of it.
This crap came out of a 35 cal rifle that was almost doing the same thing and is just a small sample of the patch's that were used.
Once cleaned out it shot well.
Anyway, it looks like the guy isn't coming back to share his findings.
This crap came out of a 35 cal rifle that was almost doing the same thing and is just a small sample of the patch's that were used.
Once cleaned out it shot well.
Anyway, it looks like the guy isn't coming back to share his findings.
dist1646
Ultimate Member
Crickets from the OP.
did you run a copper removing foam or something to get that aqua color or just a generic type cleaner?
smokey
2A TEACHER
- Jan 31, 2008
- 31,520
For badly crudded bores, running a patch of accelerator and then foaming in wipe-out for a couple hours has been fantastic. It was incredible to see how much stuff came out of my mosin.
Doco Overboard
Ultimate Member
Hoppe’s+Sweets copper killer then Kroil with JB bore paste cleaner and polish( grey and then red)once all the carbon and layers of copper were out.
Biggfoot44
Ultimate Member
- Aug 2, 2009
- 33,199
I went back to the first post to double check . The OP said " he hasn't fired in years " .
The $64 question is did the rifle tumble back then , or hit point forewards , with at least somewhat acceptable accuracy ?
If the problems were with wrong chambering, incorrect bore, etc it would have been tumbling right out of the box . If previously it more or less worked , major crown damage is the only plausible cause for sudden deterioration of that magnitude .
The $64 question is did the rifle tumble back then , or hit point forewards , with at least somewhat acceptable accuracy ?
If the problems were with wrong chambering, incorrect bore, etc it would have been tumbling right out of the box . If previously it more or less worked , major crown damage is the only plausible cause for sudden deterioration of that magnitude .
Could a damaged crown on the barrel cause it to tumble that much in 25 yards?
Short of that rifle not actually being bored as the OP indicates, significant crown damage is the only other possibility that makes sense to me. Hopefully, OP comes back with an update.
Doco Overboard
Ultimate Member
The barrel may have been kinked from having excessive amounts of heat applied to it. This could have happened during manufacture when the barrel was rolled or having been heated to do some sort of maintenance like sweating on ramps or bands.
It could also be extremely leaded or fouled and is grossly impacting the bullet construction. Once the bullet is free from the bore it is no longer rotating on the bores axis but must rely on its own axis to spiral after the center of mass has been mechanically altered while still in the bore. Rusty bores will do the same thing
I think a barrel that has minor crown damage would throw fliers, if it has a gouge in it or is ovalled could be a keyhole. It could also have a bulge in it that the owner hasn't noticed yet. Doesn't look like were going to find out.
It could also be extremely leaded or fouled and is grossly impacting the bullet construction. Once the bullet is free from the bore it is no longer rotating on the bores axis but must rely on its own axis to spiral after the center of mass has been mechanically altered while still in the bore. Rusty bores will do the same thing
I think a barrel that has minor crown damage would throw fliers, if it has a gouge in it or is ovalled could be a keyhole. It could also have a bulge in it that the owner hasn't noticed yet. Doesn't look like were going to find out.
Users who are viewing this thread
Forum statistics
Latest threads
-
Sign up on our online store and earn 1000 points- Started by J_Gunslinger
- Replies: 0
-
-
-
-
-
-
PG County getting some Liberty Doll love over a bill that would ban computers for minors- Started by jc1240
- Replies: 6