The 6UM

[Clarktar]

Same terminal behavior, higher BC, and probably the least fussy higher BC 6mm bullet with regards to precision.

Second to the 106 TAP

 

[Formidilosus]

Second to the 106 TAP

That did well for me too.

 

[cq0302]

The Barnes 112gr MatchBurners is a better VLD style bullet than the 115gr Berger.

Thank you. Also looking at supressors. Local shop has a scythe and nomad dead air on hand. Any thoughts about them? Light is a higher priority than optimal sound reduction.

 

[bielenbm]

Thank you. Also looking at supressors. Local shop has a scythe and nomad dead air on hand. Any thoughts about them? Light is a higher priority than optimal sound reduction.

Take a look at otter creek lab and diligence defense suppressors. The DD enticer is a great suppressor, at a good price point!

 

[SteveAndTheCrigBoys]

Thank you. Also looking at supressors. Local shop has a scythe and nomad dead air on hand. Any thoughts about them? Light is a higher priority than optimal sound reduction.

Lots of info on the Scythe on the forum, think that thread is at 70+ pages. Some people having issues with the end blowing off or something like that. Not sure if the prevalence rate of those failures is concerning or not.

Dead Air has terrible C/S if you need a repair, lots of info on the internet about that too. Hope I never have an issue with mine.

TBAC ultra 5 is one of the lightest options out there but leaves a lot to be desired re: suppression. Check out how it compares to others in the silencer summit results.

The AB A-10 7.62 and OCL Polonium 30 are often recommended. Got my AB recently and haven’t had a chance to shoot it yet. The OCL is next on my list.

 

[Brucebarker024]

Take a look at otter creek lab and diligence defense suppressors. The DD enticer is a great suppressor, at a good price point!

I’ll second this. I have one of each and they’re great.

 

[andarch]

i haven't ordered my dies yet for my UM. sounds like i should wait on the ADG over whidden?

Did I miss something? I know ADG is using the 1.25” die body, but what’s the reason to move away from Whidden? (Other than I ordered my Whidden dies 6 months ago and still nothing) Faster delivery would definitely make me change over.

 

[switchback270]

Did I miss something? I know ADG is using the 1.25” die body, but what’s the reason to move away from Whidden? (Other than I ordered my Whidden dies 6 months ago and still nothing) Faster delivery would definitely make me change over.

There is 1 40 degree Whidden die set in stock on UMs website right now.

 

[wind gypsy]

Did I miss something? I know ADG is using the 1.25” die body, but what’s the reason to move away from Whidden? (Other than I ordered my Whidden dies 6 months ago and still nothing) Faster delivery would definitely make me change over.

Is whidden going to continue to make them? I know they stopped making "custom" dies, not sure if the 6 UM fits that classification or not.

 

[Ryan Avery]

They will continue to make them.

Is whidden going to continue to make them? I know they stopped making "custom" dies, not sure if the 6 UM fits that classification or not.

 

[andarch]

I’ve had no problems with Whidden dies, I was just wondering if there was something awesome about the ADG dies other than they’re a double handful for Ryan’s tiny little mitts.

 

[andarch]

There is 1 40 degree Whidden die set in stock on UMs website right now.

Thanks, I called in to check and my set is in my build box with the rest of the rifle parts. I didn't want to catch FOMA (Fear of missing ammo) when my rifle is done

 

[khuber84]

Got home this evening, opened up a package from Mr Ryan Avery to reveal a 6um 30° case as ADG shipped them. Used my 0.420 diameter whidden bump gauge, measures shoulder of the 6um case, VS my new unfired adg 65saum, both measure 1.585" to shoulder datum line. I went and chambered the 6um case into my 6.5 and 6 Saum, which are chambered to go gauge +002 thou(-002 protrusion from breech, 002 deeper than go) and bolt closed with zero resistance. So the 6um 30 brass appears usable in my particular 6saum barrel. I'll prime charge and re-test and make sure the new neck values with bullet seated do not interfere with my 6saum chamber. This is a plus........

 

[andarch]

Got home this evening, opened up a package from Mr Ryan Avery to reveal a 6um 30° case as ADG shipped them. Used my 0.420 diameter whidden bump gauge, measures shoulder of the 6um case, VS my new unfired adg 65saum, both measure 1.585" to shoulder datum line. I went and chambered the 6um case into my 6.5 and 6 Saum, which are chambered to go gauge +002 thou(-002 protrusion from breech, 002 deeper than go) and bolt closed with zero resistance. So the 6um 30 brass appears usable in my particular 6saum barrel. I'll prime charge and re-test and make sure the new neck values with bullet seated do not interfere with my 6saum chamber. This is a plus........

I figure even if it hadn’t worked a pass through the sizing due would have fixed them.

 

[Brandon.miller.4]

Don't hang me for not reading through the 78 pages but a quick question for all you over-bore fellas. I notice there seems to be alot of 20" barrel guys on this thread. I'm going to be ordering a 25-7prc barrel and want to make sure i get the length right. It will be paired with a tbac ultra 7.

So why not as many 18s? 19s? Are you seeing a more significant velocity drop below 20" than the standard 20-30fps?

Thanks

 

[Jlister]

Don't hang me for not reading through the 78 pages but a quick question for all you over-bore fellas. I notice there seems to be alot of 20" barrel guys on this thread. I'm going to be ordering a 25-7prc barrel and want to make sure i get the length right. It will be paired with a tbac ultra 7.

So why not as many 18s? 19s? Are you seeing a more significant velocity drop below 20" than the standard 20-30fps?

Thanks

My reason for 20 is to hopefully not blow up a suppressor

 

[Tx_300wsm]

I’ll be running an 18” with a Scythe when brass gets here. Not too confident it’s going to stay together with all the failures being reported.


Would anyone be willing to let me borrow a go gauge? I’d pay for shipping to and from and some extra for letting me use it.

 

[Brandon.miller.4]

Has anyone had issues with thunderbeast ultra series?

 

[Ryan Avery]

Most cans will be fine with an 18" barrel. When I was blowing up cans it was with a 16" with a +P chamber with 70+ grains of 570.

 

[Brandon.miller.4]

Most cans will be fine with an 18" barrel. When I was blowing up cans it was with a 16" with a +P chamber with 70+ grains of 570.

I only ask cause I'm doing an 18" 25-7prc. Here is thunderbeasts limits on the ultra 7 ill be using. I think i should be good.