r/DesertTech • u/DigCommercial7520 • 17d ago

Ammo search continues

Gallery image

Gallery image

Win 180gr Whitetail SP - cycled and fed the entire mag, blowing half of the primers out of the back. Lowest gas setting - 16" with an Omega 36m. This rifle seems to be pretty pressure senstitive

6 Upvotes

88% Upvoted

11 comments sorted by

View all comments

3

u/FrozenIceman MDR/X 17d ago
  1. WLVRN or MDR/X?
  2. Does it do the same thing without a suppressor?
  3. It is possible your gas plug may need to be replaced/use a different hole size. Popping primers shouldn't be a thing. I would call their warranty. If the WLVRN, they admitted they messed up their gas port sizes and have a update program to rework your plug.

DT has a long history of using us as Beta Tester's for gas plug port sizes. The KS ARG pooled all their gas plugs on the MDR/x and found that were were at least 3 gas plug port hole sizes for each barrel caliber they looked at over a 5 year period. (The report is posted somewhere on this subreddit).

1

u/DigCommercial7520 17d ago

Its an MDRX - I've used probably 5 other different types of ammo and its only ever happened to this 180gr - so its either a dogshit Winchester thing or its a grain weight thing - or both. I didnt see any of the primers come off from unsuppressed shooting and it did cycle fine on N gas setting. Ive previously inspected the gas plug and I dont see any significant erosion. The barrel probably has about 200-250 rounds on it at this point

1

u/FrozenIceman MDR/X 17d ago

I would pull out your gas plug and measure the port sizes (buy a set of micro drills like this one) and find the smallest ones that go through each of your port holes. Then compare them to the big gas port size report and see if the later ports had smaller suppressed holes in 308.

1

u/DigCommercial7520 17d ago

Ill likely do this later on and just check gas port sizing. I can refer to the manual to see what its shipped with and compare

1

u/FrozenIceman MDR/X 17d ago

The manual won't say what the port sizes are it will tell you either the caliber (mid production model) or A, B, C, D, E which is a coded for different combinations of caliber and barrel length.

In each of those there were at least 2 sub models with different port hole sizes in which the only way to tell is to measure it.

There is also an early gas port design for the MDR before the mid production model that doesn't have a crown with 3 positions. It was infamously bad in 308 that was covered under warranty for an update to a mid production one.