Thread: 180gr eld M from a 20" 284win

Gidday team.

So after finally figuring out my double grouping issue with my 284win. Being the nylon bushing on my DPT suppressor isn't free floating and the bases were poked.

I've gone and grouped it with x2 5 shot groups using 162gr eld M. COAL of 3.252 , Lapua Cases, Fed LR primers and Superformance powder. This barrel has done just shy of 80 rounds. It's a shillen 1 in 8 twist and isn't quite shooting as I'd like.

So next step is to change the pill or the powder. I'm going to go the pill route and see how that goes as I think it may shoot the 180gr eld M better however I am mindful of the velocity loss for wind drift etc.

So my question is for those who have 284win and shoot the 180gr eld M(rem 700 LA) what real world speeds am I likely to get from a 20" barrel with said powder?


I'm all ears folks!

For perspective it's grouping 1.2" with 5 rounds. as seen in the picture for reference. The 2 ragged holes are promising but the spread from the outer shots isn't ideal. This is my tops rig and ultimately I'd like to get it shooting better is all.

The 5 shots in question are the top 5

Shoot 5 more rounds into that group to get a better idea of accuracy.

Originally Posted by McNotty

Shoot 5 more rounds into that group to get a better idea of accuracy.

Wouldn’t imagine it get any smaller with 5 more

Whats the ES?

@matto1234

67 for the ES which is also quite high.

The thing is for the 2 5 round groups I've fired as I've been reading up about shooting 5 round groups etc of late. This rifle load combo consistently shoots 2 rounds ragged hole with a few over the place which is why I'm wondering with the projectile I'm using is it might be not quite right for the twist rate of the barrel? I am more than happy to be proven wrong etc

Not quite real world, but GRT suggests around 2600 or so at max charge (SF with 180 ELDM).

Originally Posted by Rock river arms hunter

For perspective it's grouping 1.2" with 5 rounds.Attachment 265437 as seen in the picture for reference. The 2 ragged holes are promising but the spread from the outer shots isn't ideal. This is my tops rig and ultimately I'd like to get it shooting better is all.

The 5 shots in question are the top 5

I was always told double grouping pointed to a bedding issue.

Im running 180's in my 20" 284 - 2590fps but thats with Re19 not superformance sorry.

Originally Posted by earplay

Not quite real world, but GRT suggests around 2600 or so at max charge (SF with 180 ELDM).

@earplay

Cheers for that. Somewhere in the 2500-2550 range for a 180gr eld M would be ideal.

Originally Posted by wsm junkie

I was always told double grouping pointed to a bedding issue.

Im running 180's in my 20" 284 - 2590fps but thats with Re19 not superformance sorry.

Yeah that's what I was of the understand of but the nylon bushing not free floating and bases on the rifle being poked would've done the same thing according to a smith I took it to. Got a leupold rail popped on after checking the bedding which was fine etc so yeah that side of it is now fixed. Na that's alright it definitely gives me a good idea of real world performance so thanks for taking the time to share you're data!

I’d try some different powder charges, different seating depths or a different powder and see what it’s capable of with those 162’s as they should be fine in a 1:8 twist.

Hodgdon Superperformance is an awesome powder with and ES that high probably need to change something.
Or check reloading process what's the SD

Sent from my CPH2531 using Tapatalk

I weigh every charge individually on redding beam scales to the individual granule. I'm using a old fashioned shoot through chronograph which could be giving un true readings also

That vertical stringing will be most of the issue, go up/down in powder charges to get a lower es and then play with seating depths if its still not grouping