Bartlein New Barrel Material 400MODBB

[Gogga]

Yeah. But people remember the bright light. Not the old light.

View attachment 8474089

Especially when it goes dark

 

[Frank Green]

How often do you recommend cleaning for barrel life

Biggest thing is keeping up with it and not letting the fouling/barrel get away from you.

I’m in the camp of not letting it go past a 100ish rounds in between cleanings.

If I shot a match today and put 70 rounds on it… I’m cleaning it that night before putting another 70 more rounds on it the next day.

You let it away and you can be chasing your tail.

Some calibers are easier on barrels than others… 6CM is not easy on the sticks.

 

[BurtG]

Ok so 250 is too much.

How many do you shoot to refoul barrel ?

 

[NateVA]

Biggest thing is keeping up with it and not letting the fouling/barrel get away from you.

I’m in the camp of not letting it go past a 100ish rounds in between cleanings.

If I shot a match today and put 70 rounds on it… I’m cleaning it that night before putting another 70 more rounds on it the next day.

You let it away and you can be chasing your tail.

Some calibers are easier on barrels than others… 6CM is not easy on the sticks.

By cleaning do you mean just carbon or copper too?

 

[Gogga]

I'm with Frank, if I shot 50+ I'd clean it. If it's just a 30 round trip I'd go two trips like that and then clean. Seems good so far on a .308, YMMV.

 

[Cody S]

Type of powder plays a part as well.

Rate of fire and intervals in between cleanings are all variables as well.

Indeed and unfortunately I'm pretty hard on my guns with constant 10 and 12 round strings because I like to compete and I use whatever powder I can find.
I hate to be so hard on my bartleins but I also like to win lol.
ETA sorry I didn't see this was a mod BB
my comments have all been about regular bartlein stainless steel, whoops. haven't gotten around to ordering the mod bb yet, just wanted to be clear about that.

 

[acourvil]

6 creed is a bit overbore so you have the option of how hot.
running in 28" barrels, 3150 gave me about 1k, but 2950 gives me 1500 before I have any problems.
this barrel I'm going to see if I can get a solid 2k rounds if I slow down to dasher speeds of like 2850ish if there's a node around there.

My buddy Tony is on his 3rd or 4th barrel in 6CM. He’s running it at 2950 if I recall correctly. Everyone of his sticks has gone about 2200 rounds.

I'm near the end of my first 400MODBB barrel in 6CM. With my last 2 (regular) barrels in 6 Creed, the barrels would slow down around 1000-1100 rounds. They would then continue to shoot well for another 500-600 rounds or so, and then either slow down more or start to throw fliers. So basically I got about 1500 good rounds out of them. My current barrel started out the same, but did not slow down until just after 1500 rounds. I now have just under 2200 rounds on it. My best groups are still tight, but my perception is that overall my groups are starting to open up a bit. And I'm seeing more vertical issues in the last couple hundred rounds, hard to say if that is the barrel or the conditions. But the new barrel material has definitely extended the useful life for this caliber. This is in a 28" barrel, with ave around 3050fps at its peak, currently running around 3020fps. This is hooting a mix of PRS style matches and our club long range matches (50 shots in an hour or so, typically 3 groups of 3 at a time in maybe 5 minutes).

 

[Cody S]

I'm near the end of my first 400MODBB barrel in 6CM. With my last 2 (regular) barrels in 6 Creed, the barrels would slow down around 1000-1100 rounds. They would then continue to shoot well for another 500-600 rounds or so, and then either slow down more or start to throw fliers. So basically I got about 1500 good rounds out of them. My current barrel started out the same, but did not slow down until just after 1500 rounds. I now have just under 2200 rounds on it. My best groups are still tight, but my perception is that overall my groups are starting to open up a bit. And I'm seeing more vertical issues in the last couple hundred rounds, hard to say if that is the barrel or the conditions. But the new barrel material has definitely extended the useful life for this caliber. This is in a 28" barrel, with ave around 3050fps at its peak, currently running around 3020fps. This is hooting a mix of PRS style matches and our club long range matches (50 shots in an hour or so, typically 3 groups of 3 at a time in maybe 5 minutes).

understood, that still may be remarkably good barrel life to hold up strong for 2k rounds with a rough schedule and charge and such. which bullet again?
fwiw my statements are pertaining to 115dtacs and h4350 mostly.

 

[acourvil]

I am using a mix of 110gn Atips and 109gn ELDs. The first 1k rounds or so were mostly Atips, more recently it’s about 50-50. I am using the ELDs for PRS style matches and the Atips for our club long range matches. Powder is H4350.

 

[tinker]

I just found out about 400BB last night. A customer supplied one and they say it feels different to cut....that is (or was for me) an understatement.

I would love to hear from some other smiths, their experience on cutting these (especially on a manual machine).

I will say this was a 338LM chamber which of course is going to take longer but this was way different. Actually worried it may have hurt the reamer a little bit. This is a brand new JGS HSS reamer. Turning at @ 100 rpm. It made good chips the whole time, just took a significant amount more pressure to cut and that made me uncomfortable having never used these. I didn't notice a difference cutting the tenon thread or the cone on the chamber face (it's for a BAT CT).

I love bartlein barrels and have cut many in 416.

I really hope this thing gets the longer life like they say.