I wasn’t there when any of the animals were gutted and I unfortunately deleted the pictures of the entry and exit wounds so I can’t say for certain. If any of them use fort scott ammo this year when we go deer hnting I can try and take some autopsy pics.
The 6UM
- Thread starter Ryan Avery
- Start date
- Joined
- Oct 22, 2014
Not a bullet engineer, however all bullets will yaw (tumble) inside tissue IF they don’t upset from the front. The problem is getting them to do it consistently and early in the wound channel, and the bullet to be large enough (long) to cause good wound size. If I remember correctly, 3 plus caliber length long bullets is where they start doing it well. There are some other design considerations (nose profile, boattail length and sharp, etc) that can help, but it’s mainly long for caliber bullets and none “expanding”. I think, the DTAC nose breaking off helps at lower impact speeds to destabilize the bullet and cause it to yaw more consistently.
- Joined
- Mar 16, 2021
- Location
- Western Iowa
I’ve been wondering about their ammo as well. Bomgaars started carrying them I believe in .308, .233, and maybe 9mm? I’d never heard of them and was suspicious about their “TUI” technology.
OP
OP
- Joined
- Jan 5, 2012
She’s headed down to kill a cow elk tomorrow.
Sent from my iPhone using Tapatalk Pro
mullmann
Lil-Rokslider
- Joined
- May 29, 2013
- Location
- Chandler AZ
Well how did it do?
She’s headed down to kill a cow elk tomorrow.
Sent from my iPhone using Tapatalk Pro
@Ryan Avery is the new barrel on an Ace blank? Kinda curious about them as I just ordered a 30cal blank.
IrkedCitizen
WKR
- Joined
- May 28, 2013
- Location
- Littleton, CO
Benchmark pretty sure
Got ya
- Joined
- Aug 10, 2015
- Location
- Coeur d alene, ID.
@mullmann
Gun shoots great, no recoil, quiet, great package. When it came to the cow there was little time to get a great shot and my position was garbage, clean miss, cows only.
Did go back in the evening and looked in a couple other spots for more and no more opportunities for shots.
Was very impressed with the splash of that 115 dtac even at 1200 yards taking some shots prior to the hunt.
Gun shoots great, no recoil, quiet, great package. When it came to the cow there was little time to get a great shot and my position was garbage, clean miss, cows only.
Did go back in the evening and looked in a couple other spots for more and no more opportunities for shots.
Was very impressed with the splash of that 115 dtac even at 1200 yards taking some shots prior to the hunt.
Last edited by a moderator:
I have had this rifle for a few weeks now, it is a 6 UM put together by Jake at UM. Below are the specifics on the rifle.
Tikka T3 Lite 300 WSM Action
Proof Research 24” Sendero
MDT HNT 26 Folding stock
NF NX8 2.5-20 F1 Mil
CGS Hyperion K Suppressor
Weight is 9.1 pounds. I have had it in another config without the can, one of Ryan’s brakes, non-folding stock, and a NF 2-10 NXS. While I was able to reduce weight by approximately 1.2 pounds in this set up, I have found I shoot it much better in the current configuration. I know you could also save weight with a lighter/shorter barrel if that was a priority.
Load development was fairly quick, I started with Ryan’s data using N570 powder and Dtac 115 HBN. I worked loads from 64 up through 67.5, settling on 66 grn at 2.95 coal. Velocity is 3430 as validated at range and Lab Radar. Jake at UM was kind enough to set me up with fire formed brass to get me going, and dies are on order expected any day. So far there is 170 rounds though the barrel. For those interested in the specifics of the load development, I will make a post on the 6 UM reloading page as well.
While there may be more options for mags, I have been using several MDT styles. The 7 round short action magnum mag was a little longer than I preferred in a hunting situation, so I have a couple of the 3 round mags with 2 round extenders on them. The spring has shown to be slightly weak with the 4th and 5th rounds not feeding consistently. I took them apart and stretched the spring a bit, now they feed well. I then modified a 10 round 308 MDT mag to fit, which was very easy by simply opening the top jaws slightly with a set of pliers. It does not take much, open approximately .035 using a caliper and needle nose pliers, it is a couple minute operation. They become a 6 round mag for the 6 UM. Given this is the same size mag I use on a 6 and 6.5 CM, I am leaning towards these mags for hunting. Both mags are approximately 1 oz per round.
Using the short magnum magazines, you are limited to 2.95 coal for a clean feed. This puts me .060 off the lands, it has proven to shoot very well with this jump.
Let me know if there are any questions. Overall I am very pleased with the rifle and greatly appreciate Jake at UM for putting the rifle together for me, and Ryan for his expertise on the loading and parts side.
Tikka T3 Lite 300 WSM Action
Proof Research 24” Sendero
MDT HNT 26 Folding stock
NF NX8 2.5-20 F1 Mil
CGS Hyperion K Suppressor
Weight is 9.1 pounds. I have had it in another config without the can, one of Ryan’s brakes, non-folding stock, and a NF 2-10 NXS. While I was able to reduce weight by approximately 1.2 pounds in this set up, I have found I shoot it much better in the current configuration. I know you could also save weight with a lighter/shorter barrel if that was a priority.
Load development was fairly quick, I started with Ryan’s data using N570 powder and Dtac 115 HBN. I worked loads from 64 up through 67.5, settling on 66 grn at 2.95 coal. Velocity is 3430 as validated at range and Lab Radar. Jake at UM was kind enough to set me up with fire formed brass to get me going, and dies are on order expected any day. So far there is 170 rounds though the barrel. For those interested in the specifics of the load development, I will make a post on the 6 UM reloading page as well.
While there may be more options for mags, I have been using several MDT styles. The 7 round short action magnum mag was a little longer than I preferred in a hunting situation, so I have a couple of the 3 round mags with 2 round extenders on them. The spring has shown to be slightly weak with the 4th and 5th rounds not feeding consistently. I took them apart and stretched the spring a bit, now they feed well. I then modified a 10 round 308 MDT mag to fit, which was very easy by simply opening the top jaws slightly with a set of pliers. It does not take much, open approximately .035 using a caliper and needle nose pliers, it is a couple minute operation. They become a 6 round mag for the 6 UM. Given this is the same size mag I use on a 6 and 6.5 CM, I am leaning towards these mags for hunting. Both mags are approximately 1 oz per round.
Using the short magnum magazines, you are limited to 2.95 coal for a clean feed. This puts me .060 off the lands, it has proven to shoot very well with this jump.
Let me know if there are any questions. Overall I am very pleased with the rifle and greatly appreciate Jake at UM for putting the rifle together for me, and Ryan for his expertise on the loading and parts side.
OP
OP
- Joined
- Jan 5, 2012
She looks fast!!
How did she do on elk?
How did she do on elk?
- Joined
- May 19, 2021
- Location
- Western Wyoming
This is such a well thought-out setup. Nicely done. I'll be stealing your MDT mag hacks.
-J
OP
OP
- Joined
- Jan 5, 2012
It looks like 6UM country.
9.3koolaid
Lil-Rokslider
- Joined
- Feb 2, 2017
- Location
- Alaska
When does the suppressor wrap come out?
Ryan,
It performed very well on elk, one shot at 505 yds, it was over quickly. Bullet did exit, both entrance and exit were through the ribs right behind the shoulder. Based on the exit hole, the bullet appeared to keep a substantial amount of mass. Neither entrance or exit showed the amount of blood shot that I have seen with the 108 ELDM, for whatever that is worth based off one shot.
9.3koolaid,
Still working on the suppressor cover, that fabric is a little bit tough to work with on finishing edges, I need to figure that out. Will keep you posted though.
It performed very well on elk, one shot at 505 yds, it was over quickly. Bullet did exit, both entrance and exit were through the ribs right behind the shoulder. Based on the exit hole, the bullet appeared to keep a substantial amount of mass. Neither entrance or exit showed the amount of blood shot that I have seen with the 108 ELDM, for whatever that is worth based off one shot.
9.3koolaid,
Still working on the suppressor cover, that fabric is a little bit tough to work with on finishing edges, I need to figure that out. Will keep you posted though.
PathFinder
WKR
- Joined
- Sep 8, 2014
- Location
- Front Range, Colorado
Very solid work, I like that configuration. It's good to see a few rifles now that are very near the same powder charge and velocity. Appreciate the terminal update as well.
Couple of questions. What would make you choose 1:8 or 1:7 twist? For the non-suppressor hold outs (I know, I know) what barrel length would one choose?
I've got a little different thought on cartridge because there is a Howa .270 sitting in the shop needing a new life. It's whispering 6mm-06 AI. Should be very comparable to the UM.
Jeremy
I've got a little different thought on cartridge because there is a Howa .270 sitting in the shop needing a new life. It's whispering 6mm-06 AI. Should be very comparable to the UM.
Jeremy
OP
OP
- Joined
- Jan 5, 2012
I would highly recommend a 7.5 or 8 twist if you're planning to shoot ELD-Ms or NR Dtacs. If you're shooting without a can, a barrel length of 22 to 24 inches will be more than sufficient. If you want 3500+ go 26 inches or longer.
- Joined
- Aug 10, 2015
- Location
- Coeur d alene, ID.
You shouldn't have any issue spotting those. Shot Ryan's this last weekend for a few shots and when steady could get right back on them 16.75" +can.
If I wasn't in a good position then obvious results.
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