when to rebarrel?

[Boomer79]

I have a 270 WSW and checked the length to the rifleling with my Stonypoint on a Nosler 150 gr ballistic tip and found it to be 3.030. The recommended OAL 2.860. The recommended jump from Nosler is 15-30 thousands. Should I be thinking it's time to re-barrel. It still groups fair, but I reload and shoot 40 rounds almost every weekend and want to be ready for next years deer season.

 

[tbs]

40 X 52 weeks = 2080 rounds come next deer season, how many have you put through it already?

 

[Rustystud]

There are several reasons to rebarrel. The first is the rifle producing satisfactory accuracy. Everyone has a different accuracy expectations. A bench rest shooter expects consistent 5 shot groups in the teens to low .2s. The F-class shooter expects a new barrels to shoot 10 shots in .4 at a 100 yards and to hold X ring vertical at 1000 yards. The hunter and service rifle should should expect 1 MOA or better.

Another reason for rebarreling the rate of twist does not match the bullet weight one wants to shoot.

The barrel weigh or length does not match the shooting being done.

It is hard to compare a $80.-$100. factory barrel to a $300.-$400. custom barrel.


Nat Lambeth

 

[M700]

Start the process soon. If you have to order a custom made barrel, anticipate several MONTHS wait before delivery. Once it's on hand, the re-barreling process doesn't usually take long.

You don't want to be working up new loads and breaking in the new barrel a week before next deer season.

Guy

 

[Larryh128]

Seriously, I wouldn't be too worried about the bullet jump as long as it's shooting good. There are a lot of factory barrels that have VERY long throats and shoot extremely well. All Weatherby mags for instance also every Ruger #1 that I've ever come across. All of my hunting rifles are set up to #1 feed properly from the magazine & #2 be accurate. 1/8" on a group really means nothing in a hunting rifle but the ability to feed properly could be a big deal.
Don't discount being able to re-cut the chamber if you have enough shank on the barrel.

 

[fm1947]

Not that big of a deal if it is 3.030 and recommended is 2.860, my question would be at 3.030 is there enuff case neck left if you wanted to seat the bullet right at 3.030 would it hold the bullet tight?, recommended coal really doesnt mean a whole lot I seat most of mine .005 just out from where that stoney point is hitting lands. Do you know what it was when it was new?

 

[fm1947]

One more thing I have never known of a MFG like Nosler giving the lenght from ogive, your Hornady or stoney point measure from ogive

 

[Boomer79]

I did not specify touching the ogive, but I did say touching the lands.

 

[fm1947]

well you cant touch the lands with the tip, so you have to be touching with stoney tool that hits on ogive

 

[MrMajestic]

well you cant touch the lands with the tip

If you do you might want to check your runout! :

 

[fm1947]

lmao-- that was a good one MrMajestic, yep i agree runout would be about 20 Degrees out

 

[effendude]

A crusty old HP shooter tells the story of seating bullets upside down and not noticing any difference in accuracy at shorter yardages. Open sights, 2moa target, and all. He is a High Master, so I don't doubt his skill, I just have not tried it myself! I don't have a rifle is dislike that much. He and a buddy used to make jacketed bullets out of fired .22rimfire shells also so who knows. Talk about cheap!Base to ogive measurements would be pretty short!
Scott

 

[fm1947]

boomer79,

To help you further, you have no barrel issue , that dimension you were given by nosler like I said is common COL that all data books use but useing the Hornady tool they call I think OAL gauge and has several uses, one being to intentionally find the lands for seating purposes, and is used in conjunction with a bullet comparator that also has several uses, in this case after touching lands a person takes the comparator this has a hole that bullet tip fits in to a area that starts a curve more or less that is called the ogive, it is used for a more precise measurement due to most bullets can vary a good .008 from tip to base the ogive is a more constant measurement but not perfect, so your problem was you had two measurements that were not alike, I hope this helps but the difference you were getting was the distance fron tip to ogive that made you think your throat was wore out.

 

[Erik Cortina]

Sounds like he used the Stoney Point tool to find the lands and once he did measured the case in the tool from base to tip (OAL)? The OP says nothing about a bullet comparator.

 

[fm1947]

thats my thought

 

[Erik Cortina]

I would order another barrel at this time and when it comes in make a decision at that time. If he decides to rebarrel he already has the barrel, if he doesn't then keep the barrel until he's ready to do so.

What would I do? I would rebarrel.

 

[CaptainMal]

Just sold a barrel that was throated long when I got it. Did not know how long until getting tools to measure that a few years ago. For 5 years I shoot with maybe 1/4" jump and it shot well. When I changed the seating depth closer to the lead,e there was little grouping change.

Buy the new barrel. Hang on to it. Shoot the old barrel. May you age with that new barrel still at the ready. You might be surprised at how long it will still last.

 

[Shynloco]

Start the process soon. If you have to order a custom made barrel, anticipate several MONTHS wait before delivery. Once it's on hand, the re-barreling process doesn't usually take long.

You don't want to be working up new loads and breaking in the new barrel a week before next deer season.

Guy

Probably sound advice....HOWEVER, depending on who makes the barrel for you, some may take months, but Hart will make you one in 6 - 8 weeks. At least that was my experience when I ordered one (6.5 BR) from them last April and it was at my front door in 7 weeks. They stopped government contracts last year. Don't forget, some barrel manufacturers have government contracts that take priority, but now with the troops coming home from Iraq, I suspect the demand for barrels by the military will be significantly reduced. Just a consideration to think about.

 

[Boomer79]

Thanks, that was extremely helpful. I now understand how to use the bullet comparator in conjunction with the OAL gauge for proper bullet seating depth. However, I suspect the proper seating depth will not allow the loaded round to fit in the magazine. I will find out tonight. A custom barrel will alleviate that problem.

 

[fm1947]

boomer79 I knew you wernt useing it right that is why i said you do not have a barrel problem I explain the whole thing to you glad you paid attention, I work at a range and teach a class on all this stuff I am retired and love to pass it all on.