The 6UM

[Tx_6UM]

Alot slower than i was expecting. 66.2 N570. 18" barrel

115’s? If so Mine is about the same. I was getting 3023 with 66 this past week. I was disappointed initially but it is still a 1000 yard gun at that speed. Ace barrel?

 

[Gstew1930]

115’s? If so Mine is about the same. I was getting 3023 with 66 this past week. I was disappointed initially but it is still a 1000 yard gun at that speed. Ace barrel?

Yeah 115s. Yeah its an Ace barrel

 

[bielenbm]

Finally got out to zero my gun today.
18” Ace barrel
3121mv
115s
66 n570

The one shot I pulled when my dog jumped on me.

 

[bielenbm]

630 yards, first shot after zeroing!

 

[TradLife406]

630 yards, first shot after zeroing!

Hahah awesome!
Kind of wondering about going to an 18" once my 22"

 

[bielenbm]

Hahah awesome!
Kind of wondering about going to an 18" once my 22"

I happy with it. I’m getting 3120 with the dtacs.

 

[TradLife406]

I happy with it. I’m getting 3120 with the dtacs.

More than enough for me. 3300 is what my 22" is doing which takes me out to 1200. Way past my skill set.

 

[Andrew31]

The ManBun is done. Now to wear out the BBL fire forming.

 

[TradLife406]

The ManBun is done. Now to wear out the BBL fire forming.

Haha fire forming wasn't that bad. Just 100 rounds off the barrel life. But that'll just break in the new pipe.


Sent from my iPhone using Tapatalk

 

[doc holiday13]

If you're burning 58 grains of powder in a 6mm bore and you want to get some mileage out of the barrel, heat does matter at least a little. I'm not saying to be one of those "only the first shot matters so I let my barrels cool between shots" jokers but I wouldn't go full on nuclear on a highly overbore hunting barrel if I cared about it lasting a while.

How many people are truly burning out their barrels?? 6UM, 300 RUM, etc.. all have max barrel life of roughly 800-1000k rounds before groups are opening up beyond 1.25".. Lets do the math on how long a barrel will last

0-200 rounds is sight in, break in, and load development. so that leaves 600-800 rounds for hunting. Lets be overly assumptive and assume people are taking 2 rounds per animal. Thats 300-400 animals. We could make another assumption that people are shooting on average 5 animals per year(this is hunting website, not ELR). In theory, that barrel will be lasting 60 years. There are a few people who will light off 15-20 animals/year. But maybe lets assume everyone everyone is shooting 1 box of these ultra mag type rounds/per year... Thats 15 years.

That said... Should we really care about burning out a barrel?

 

[wind gypsy]

How many people are truly burning out their barrels?? 6UM, 300 RUM, etc.. all have max barrel life of roughly 800-1000k rounds before groups are opening up beyond 1.25".. Lets do the math on how long a barrel will last

0-200 rounds is sight in, break in, and load development. so that leaves 600-800 rounds for hunting. Lets be overly assumptive and assume people are taking 2 rounds per animal. Thats 300-400 animals. We could make another assumption that people are shooting on average 5 animals per year(this is hunting website, not ELR). In theory, that barrel will be lasting 60 years. There are a few people who will light off 15-20 animals/year. But maybe lets assume everyone everyone is shooting 1 box of these ultra mag type rounds/per year... Thats 15 years.

That said... Should we really care about burning out a barrel?

My point was simply that with something so overbore, i'd at least give some consideration to how hot the barrel is during fireforming if a guy wants it to make it 800 rounds. Like dont shoot 50 rounds through it with zero cooling time. I'm pretty sure there's a guy earlier in this thread who killed his barrel during fireforming..

 

[Wprinkle]

Here is what I got with 66 N570, 18 inch ace (.236 bore) tikka action, 115 dtac. Fire formed a batch then loaded 12 for a pressure test.. Second lot of brass seems super soft, crunching about 1 in every 8-10...

 

[Wprinkle]

DTac works well for clearing brush too

 

[wy_will]

How many people are truly burning out their barrels?? 6UM, 300 RUM, etc.. all have max barrel life of roughly 800-1000k rounds before groups are opening up beyond 1.25".. Lets do the math on how long a barrel will last

0-200 rounds is sight in, break in, and load development. so that leaves 600-800 rounds for hunting. Lets be overly assumptive and assume people are taking 2 rounds per animal. Thats 300-400 animals. We could make another assumption that people are shooting on average 5 animals per year(this is hunting website, not ELR). In theory, that barrel will be lasting 60 years. There are a few people who will light off 15-20 animals/year. But maybe lets assume everyone everyone is shooting 1 box of these ultra mag type rounds/per year... Thats 15 years.

That said... Should we really care about burning out a barrel?

How many people only shoot animals after finding a load and don’t tinker or practice anymore? I shoot hundreds and hundreds of rounds through my hunting rifles every year. I also think 800-1000 rounds before the barrel of a 6UM is burned out is very generous. People have burned them up in 400. Id guess 600-700 is probably more realistic. 800 if you’re lucky. Maybe I’m wrong though….

 

[Axlrod]

Here is what I got with 66 N570, 18 inch ace (.236 bore) tikka action, 115 dtac. Fire formed a batch then loaded 12 for a pressure test.. Second lot of brass seems super soft, crunching about 1 in every 8-10...

For fireforming new brass in necked down wildcats (20 Vartarg, 6.5-284, 6-7PRC) and new 416 Rigby brass, I lightly coat the base of the bullet with imperial sizing wax before seating.
I have had zero issues with 600+ rounds.

 

[Wprinkle]

For fireforming new brass in necked down wildcats (20 Vartarg, 6.5-284, 6-7PRC) and new 416 Rigby brass, I lightly coat the base of the bullet with imperial sizing wax before seating.
I have had zero issues with 600+ rounds.

Appreciate that!

 

[Procision Arms]

6UM, 115 NR DTAC, 3180 MV, 730 yard bang flop.

It’s so nice to be able to watch the entire shot/impact through the scope and still have the performance to take longer shots or have the extra wind resistance.

 

[JM151]

6UM, 115 NR DTAC, 3180 MV, 730 yard bang flop.

It’s so nice to be able to watch the entire shot/impact through the scope and still have the performance to take longer shots or have the extra wind resistance.

What is your barrel length? I’ve been wanting to do a 18”.

 

[benconfused]

How many people are truly burning out their barrels?? 6UM, 300 RUM, etc.. all have max barrel life of roughly 800-1000k rounds before groups are opening up beyond 1.25".. Lets do the math on how long a barrel will last

0-200 rounds is sight in, break in, and load development. so that leaves 600-800 rounds for hunting. Lets be overly assumptive and assume people are taking 2 rounds per animal. Thats 300-400 animals. We could make another assumption that people are shooting on average 5 animals per year(this is hunting website, not ELR). In theory, that barrel will be lasting 60 years. There are a few people who will light off 15-20 animals/year. But maybe lets assume everyone everyone is shooting 1 box of these ultra mag type rounds/per year... Thats 15 years.

That said... Should we really care about burning out a barrel?

I’ve often thought about this. Is there no merit to shooters practicing annually after the initial site-in?

Not as their primary trainer of course, but just pre-season etc. Say 100 rnds annually for that? (Spitball number)