270 Weatherby Vanguard chambered in 270 win....
- Thread starter bustem19
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bustem19
New member
Ok I'm trying really hard to understand when everyone is talking about "jump" but I can't get that one figured out. I understand the longer the case overall length the closer to the rifling and you don't want to seat a bullet that's going to be in the rifling etc etc.
I believe I need an OAL gauge because it is more accurate for this then a dial caliper true? Also does this help measure freebore?
Thanks for the info Spike. I was also reading today that guys will measure the magazine length and make that their COL... Is that a good idea? I could assume not
I believe I need an OAL gauge because it is more accurate for this then a dial caliper true? Also does this help measure freebore?
Thanks for the info Spike. I was also reading today that guys will measure the magazine length and make that their COL... Is that a good idea? I could assume not
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bustem,
I have a mk5 270 wea that I have had the free bore removed because the bullet jump from the case was too long. I could not get the bullet close to the rifeling with the hope of improving accuracy. the long cartridge col would not fit in the magazine. I have shot it once since the free bore has been removed and there is improvement in the groups.
I have a 257wea vanguard with the free bore as it came from the factory and it shoots good. I set the col to work in the magazine and don't have to worry about the col as it shoots good.
If you would like to know how much the bullet is jumping from the case to the rifeling, here is a way to find out. I put a jag on a cleaning rod with the point ground off so as to have a flat tip. I put the rod in the barrel from the muzzle end insert the rod to the bolt face of an EMPTY CHAMBER. I mark the rod with tape or pen. next I remove the bolt and drop a bullet (just the head) and hold it in place with a pencil while I insert the rod again from the muzzle end. when the rod comes in contact with the bullet I mark the rod again.the distance between the two marks gives you the distance from bolt face to rifeling. spike
I have a mk5 270 wea that I have had the free bore removed because the bullet jump from the case was too long. I could not get the bullet close to the rifeling with the hope of improving accuracy. the long cartridge col would not fit in the magazine. I have shot it once since the free bore has been removed and there is improvement in the groups.
I have a 257wea vanguard with the free bore as it came from the factory and it shoots good. I set the col to work in the magazine and don't have to worry about the col as it shoots good.
If you would like to know how much the bullet is jumping from the case to the rifeling, here is a way to find out. I put a jag on a cleaning rod with the point ground off so as to have a flat tip. I put the rod in the barrel from the muzzle end insert the rod to the bolt face of an EMPTY CHAMBER. I mark the rod with tape or pen. next I remove the bolt and drop a bullet (just the head) and hold it in place with a pencil while I insert the rod again from the muzzle end. when the rod comes in contact with the bullet I mark the rod again.the distance between the two marks gives you the distance from bolt face to rifeling. spike
2muchgun
New member
dogtired
New member
Originally Posted By: Spikebustem,
I have a mk5 270 wea that I have had the free bore removed because the bullet jump from the case was too long. I could not get the bullet close to the rifeling with the hope of improving accuracy. the long cartridge col would not fit in the magazine. I have shot it once since the free bore has been removed and there is improvement in the groups.
I have a 257wea vanguard with the free bore as it came from the factory and it shoots good. I set the col to work in the magazine and don't have to worry about the col as it shoots good.
If you would like to know how much the bullet is jumping from the case to the rifeling, here is a way to find out. I put a jag on a cleaning rod with the point ground off so as to have a flat tip. I put the rod in the barrel from the muzzle end insert the rod to the bolt face of an EMPTY CHAMBER. I mark the rod with tape or pen. next I remove the bolt and drop a bullet (just the head) and hold it in place with a pencil while I insert the rod again from the muzzle end. when the rod comes in contact with the bullet I mark the rod again.the distance between the two marks gives you the distance from bolt face to rifeling. spike
I think that he has a 270 Winchester so the freebore that is designed in the Weatherby cartridge chambers probably does not apply to his rifle.
I have a mk5 270 wea that I have had the free bore removed because the bullet jump from the case was too long. I could not get the bullet close to the rifeling with the hope of improving accuracy. the long cartridge col would not fit in the magazine. I have shot it once since the free bore has been removed and there is improvement in the groups.
I have a 257wea vanguard with the free bore as it came from the factory and it shoots good. I set the col to work in the magazine and don't have to worry about the col as it shoots good.
If you would like to know how much the bullet is jumping from the case to the rifeling, here is a way to find out. I put a jag on a cleaning rod with the point ground off so as to have a flat tip. I put the rod in the barrel from the muzzle end insert the rod to the bolt face of an EMPTY CHAMBER. I mark the rod with tape or pen. next I remove the bolt and drop a bullet (just the head) and hold it in place with a pencil while I insert the rod again from the muzzle end. when the rod comes in contact with the bullet I mark the rod again.the distance between the two marks gives you the distance from bolt face to rifeling. spike
I think that he has a 270 Winchester so the freebore that is designed in the Weatherby cartridge chambers probably does not apply to his rifle.
bustem19
New member
270 Winchester is the cartridge. It's a 270 weatherby vanguard gun...
I'm not the only one having this problem either. It was mentioned in this one about a bedding issue too.
http://www.longrangehunting.com/forums/f17/thoughts-270-weatherby-70398/
I'm not the only one having this problem either. It was mentioned in this one about a bedding issue too.
http://www.longrangehunting.com/forums/f17/thoughts-270-weatherby-70398/
dogtired
New member
I assume this is the post you mean:
My dad has had a Mark V in 270 Wby for many years that's just a safe queen because it's good for maybe 2 shots and then the groups really open up.
But, it sure looks nice and he had too many shooters to worry with that one.
We never bothered handloading for it because we always assumed it was a problem with the barrel not being properly stress relieved. I may rebarrel it someday.
I had a 240 Wby Mark V that was the same way and I traded for a M70 which I've never since regretted.
I've seen some good ones. So, don't let me get you down.
The 270 Weatherby is considered on the overbore side. So two accurate shots before groups opened up could be just a hot barrel. The 270 Win should take a few more shots to get hot enough for wandering but you never know. Do you have a thin barrel in your rifle? Bedding could help this problem as mentioned in the thread.
The 270 Weatherby chamber also has some "freebore", one of Roy's mods to make the rifle shoot well. I have heard of people rechambering with no free bore and improving accuracy. Your chamber should not have this freebore being a 270 Win.
My dad has had a Mark V in 270 Wby for many years that's just a safe queen because it's good for maybe 2 shots and then the groups really open up.
But, it sure looks nice and he had too many shooters to worry with that one.
We never bothered handloading for it because we always assumed it was a problem with the barrel not being properly stress relieved. I may rebarrel it someday.
I had a 240 Wby Mark V that was the same way and I traded for a M70 which I've never since regretted.
I've seen some good ones. So, don't let me get you down.
The 270 Weatherby is considered on the overbore side. So two accurate shots before groups opened up could be just a hot barrel. The 270 Win should take a few more shots to get hot enough for wandering but you never know. Do you have a thin barrel in your rifle? Bedding could help this problem as mentioned in the thread.
The 270 Weatherby chamber also has some "freebore", one of Roy's mods to make the rifle shoot well. I have heard of people rechambering with no free bore and improving accuracy. Your chamber should not have this freebore being a 270 Win.