lets talk about barrel life...

[diver160651]

Derail away I like the discussion

As far as barrel length goes I’ve ran from 30” down to 22” and maybe it’s just me but the shorter barrels are easier to tune and seem a bit more accurate but I think 26” is the sweet spot where handy/velocity and accuracy meet...I’ve shot 24” the last few barrels and you can get the speed but you have to lean on them a little.
My current barrel is 26” and 3030 is not hot it’s in the low warm side I could probably lean on it a little and get 3100

Last 47 barrel was 24” and I was running 130s at 2925-2940 with varget.

As far as shooting fast loads and barrel life goes I don’t think there’s a huge difference...my first 47 barrel was 24” and lasted 2175 before it was done shooting 140 hybrids at 2725-2740.

And like I said I’ll take a faster load that’s a little looser over a slower tighter load...I shot 130g Berger hybrids out of a 24” Krieger 260 rem at 3050 for 1950-1975 rounds.

No the 123s are not sensitive but the shoot best from touching out to .020 off I haven’t tried any deeper...one of our better shooters has never shot anything but 123s and he’s been shooting 20yrs...he runs they 3050 out of a 26” barreled creed.

I only run varget in the 47 4350 don’t give the speed or accuracy that varget does and varget has shot every bullet I’ve tried outstanding...like you I’m tired of reloading so I stick with what works I don’t want to chase loads anymore


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Thanks! I have enough varget or 4350 to do either, for a couple of barrel lives.

I was getting slower speeds with varget on my 26" with 140's, than the 4350.. But I don't know if that is common or just me.. I have a 22 and 24 in other 6.5s. Maybe I'll test a few 123s with varget on those and see what I get before getting carried away with the new barrels.

Thanks for the help..

BTW one of those is a factory CM barrel -- shoots ok.. But have to wonder, about the question posted above regarding longer life of CM. Even if "peak" accuracy is longer than SS, the CM barrels I've shot, kinda start on the "getting old and tired" side of higher end SS barrels. So even if they do last longer, it seems kinda pointless... Maybe Lynn would know what the actual difference is.

[longrange1]

[LynnJr]

Longrange1
I don't do the type of shooting you guys do but I always have an opinion.
The shorter barrels are stiffer so they tend to tune easier in my opinion. The straight cylinder barrels seem to tune easier as well again that is my opinion.
Some barrels fade away slowly while others completely stop shooting and in my experience the bigger the bore the more noticeable it becomes.
I changed out 2 barrels a year while competing regardless of the round count because I had a place in line with a super gunsmith.
Keep your powder charge near the top of the node not the middle or beginning and seat all your rounds to within 0.001 of each other using a comparator.
The variation you will see is coming from the bullets and it is an eye opener. I have seen 0.023 variation out of a box of 100 bullets.
If your shooting a 6mm try a box of 103 VaporTrail bullets or the ones made by Randy Robinette if you can get them. If not give the Berger 105 BT bullets a try not the VLD or 108's.

[augoldminer]

How many have taken a bore scope and checked the bore just in front of the chamber.

I had 220 swift that in 300 rounds had removed a 1/2 inch of rifling from just in front of the chamber.

[Scottie15]

Regarding the derail...

Longrange, Diver - I've had great accuracy in a 6.5 cm AR with the 123 Scenars. Very forgiving to jump in my experience on this barrel, accurate and no pressure/primer issues back before JP came out with their high pressure bolt.

[longrange1]

Longrange1
I don't do the type of shooting you guys do but I always have an opinion.
The shorter barrels are stiffer so they tend to tune easier in my opinion. The straight cylinder barrels seem to tune easier as well again that is my opinion.
Some barrels fade away slowly while others completely stop shooting and in my experience the bigger the bore the more noticeable it becomes.
I changed out 2 barrels a year while competing regardless of the round count because I had a place in line with a super gunsmith.
Keep your powder charge near the top of the node not the middle or beginning and seat all your rounds to within 0.001 of each other using a comparator.
The variation you will see is coming from the bullets and it is an eye opener. I have seen 0.023 variation out of a box of 100 bullets.
If your shooting a 6mm try a box of 103 VaporTrail bullets or the ones made by Randy Robinette if you can get them. If not give the Berger 105 BT bullets a try not the VLD or 108's.

i was hoping youd jump in here...while we dont shoot the same disciplines you know more than most of us ever will about a lot of this.

no i gave up on the 6mm and went back to the 6.5mm.

How many have taken a bore scope and checked the bore just in front of the chamber.

I had 220 swift that in 300 rounds had removed a 1/2 inch of rifling from just in front of the chamber.

yes i have a bore scope and check my barrels every couple of times out more so looking for fouling but i can tell you a have less than 300 rounds on this new 47 barrel and the fire cracking is about an 1" or so past the neck area but lands are the same...the 220 swift is a barrel burner and by the time your done with that barrel i bet you loose 2"+.

[longrange1]

Regarding the derail...



Longrange, Diver - I've had great accuracy in a 6.5 cm AR with the 123 Scenars. Very forgiving to jump in my experience on this barrel, accurate and no pressure/primer issues back before JP came out with their high pressure bolt.

[Scottie15]

My load for the 6.5 cm was with H4350. That stuff just works in the 6.5. Velocity was not great even with near max loads of Varget for me.

[longrange1]

lets talk about barrel life...

And the 4350 worked ok for me in the 47(I tried it in all 3 barrels)lotta guys shoot it but varget is faster and has been way more accurate right outta the gate.

When I shot a 260 and a 6cm 4350 was the go to.


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[diver160651]

lets talk about barrel life...

Longrange1

I don't do the type of shooting you guys do but I always have an opinion.

The shorter barrels are stiffer so they tend to tune easier in my opinion. The straight cylinder barrels seem to tune easier as well again that is my opinion.

Some barrels fade away slowly while others completely stop shooting and in my experience the bigger the bore the more noticeable it becomes.

I changed out 2 barrels a year while competing regardless of the round count because I had a place in line with a super gunsmith.

Keep your powder charge near the top of the node not the middle or beginning and seat all your rounds to within 0.001 of each other using a comparator.

The variation you will see is coming from the bullets and it is an eye opener. I have seen 0.023 variation out of a box of 100 bullets.

If your shooting a 6mm try a box of 103 VaporTrail bullets or the ones made by Randy Robinette if you can get them. If not give the Berger 105 BT bullets a try not the VLD or 108's.

Lynn,

Someone asked a question about CM barrels lasting longer than SS barrels.

While your accuracy needs are measured in parts of 1/10ths, I am ok with a couple. I have had a lot of factory CM barrels but none that shoot much better than 2/10s (just at and sometimes above 1/2 MOA)

It seems lasting longer is just that, so I see no advantage to CM, just worst longer, unless used in auto fire. But I have no idea in precision rifle, it is just a guess. My CMs spin off fairly fast.

Can you ahead light on the truth?






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[LynnJr]

The chromoly barrels are a bit harder to machine than stainless so it is said you get a better finish with stainless.
I had Randy Dierks fit some barrels up in chromoly and stainless and they pretty much shot the same but the chromoly rusted quicker and needed a different cleaning routine.
I now use stainless on everything even hunting rifles and if your after that black finish you can have a stainless barrel melonited.
You can cut a stainless steel barrel with a serrated knife pretty easily.

[Mustang]

Are there any inside linings, like chrome, that can extend barrel life?

[russ69]

Are there any inside linings, like chrome, that can extend barrel life?

Good question. Yes, hard chrome will help extend barrel life but it's hard to plate evenly down a long small hole so sometimes the diameter is not perfect the entire length of the barrel. The hard chrome is very hard and cannot be lapped to correct the issue. Some chrome plated barrels can shoot very good but they are seldom used in target guns.

[diver160651]

The chromoly barrels are a bit harder to machine than stainless so it is said you get a better finish with stainless.
I had Randy Dierks fit some barrels up in chromoly and stainless and they pretty much shot the same but the chromoly rusted quicker and needed a different cleaning routine.
I now use stainless on everything even hunting rifles and if your after that black finish you can have a stainless barrel melonited.
You can cut a stainless steel barrel with a serrated knife pretty easily.

Thanks!


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[baih777]

Has anyone tried a melonite barrel ?