New origin build

[NJRaised]

Just wanted to say thanks for all the help with building this rifle. Lots of good guys on this forum. Getting to the range Monday and first competition later this month with it.

Origin SA
24” Proof 1:7 223 rem
Mpa comp chassis
TT diamond flat trigger
Vortex PMR rings 1.24”
Razor Gen 2
MDT AICS mags
Atlas CAL bipod w/ RRS BTC adapter
Threaded, no muzzle device yet.

 

[TM6]

Looks like you went with Owen and had Garret do the chamber/muzzle work? Good luck at the Comp, hope that you do well.

TM6

 

[NJRaised]

Looks like you went with Owen and had Garret do the chamber/muzzle work? Good luck at the Comp, hope that you do well.

TM6

Yes. Owen is good people. Preece did the chambering and muzzle work.

Fingers crossed she’s a shooter.

 

[03machstock]

How did it shoot?

 

[NJRaised]

How did it shoot?

Lights out. Didn’t have a ton of time to hit the range before the kid got off the bus, probably got 30 rounds in. Shot 5 groups and I think the worst was a .6”. Might have pushed one or two fliers (I’m contributing that to cold weather, coffee, and rushing to get home for the bus haha)

 

[NJRaised]

Hit the range again today. I put some FGGM 69gr through it, eight x 5 round groups, biggest was a .7” spread. Average was a .5”

Started shooting 75gr hornady BTHP, and this was the result, 5 shot group.

Still working on getting some feeding issues resolved. Ordered up some accurate mags, aics pattern.

 

[03machstock]

Hit the range again today. I put some FGGM 69gr through it, eight x 5 round groups, biggest was a .7” spread. Average was a .5”

Started shooting 75gr hornady BTHP, and this was the result, 5 shot group.

Still working on getting some feeding issues resolved. Ordered up some accurate mags, aics pattern.

That thing is a hammer. Care to share your load?

 

[NJRaised]

That thing is a hammer. Care to share your load?

75 gr hornady BTHP
24.1 gr N140
Lapua brass

 

[NJRaised]

Now I just gotta get some mags to feed better. These poly mdts are killing me.

 

[Vandoogle13]

Now I just gotta get some mags to feed better. These poly mdts are killing me.

I had the same issue with my mdt poly magazines in my MPA chassis.
The fix was adjusting the mag latch higher so the magazine sits closer to the action, give it a shot its really easy to do amd it's free.

 

[NJRaised]

I had the same issue with my mdt poly magazines in my MPA chassis.
The fix was adjusting the mag latch higher so the magazine sits closer to the action, give it a shot its really easy to do amd it's free.

I tried this. I have it adjusted all the way up, and it’s still giving me an issue.

I have it set right now all the way up, and then sanded the feed lips down as thin as possible so that the bolt had clearance to pass the magazine. It feeds but still requires a lot of effort. It also feels like the action is functioning as a “push feed” rather than the round sliding under the extractor.

 

[Vandoogle13]

I tried this. I have it adjusted all the way up, and it’s still giving me an issue.

I have it set right now all the way up, and then sanded the feed lips down as thin as possible so that the bolt had clearance to pass the magazine. It feeds but still requires a lot of effort. It also feels like the action is functioning as a “push feed” rather than the round sliding under the extractor.

Damn, that's a bummer. Hopefully a different magazine does the trick.

 

[Rob01]

75 gr hornady BTHP
24.1 gr N140
Lapua brass

Velocity?

 

[NJRaised]

Velocity?

Approx 2750

 

[Rob01]

Approx 2750

Seems a little slow for a 24”. Any pressure?

 

[NJRaised]

Seems a little slow for a 24”. Any pressure?

Nothing. Working up the charge slowly.

 

[Rob01]

Nothing. Working up the charge slowly.

Cool was just wondering as I have friends that use N135 and 75 ELDs getting 2930fps in 26" barrels. I have some N135 on order but could change to N140 if it seemed to work better but from all my looking around it seems N135 is favored by a little for 75s. Seems like you can't go wrong with either and their burn rates which are close to other known good powders.

 

[Nbleak21]

I’m needing to pick up some mags myself. By poly do you mean the poly/steel mags that are give you trouble or are you using straight poly that is trouble?

 

[NJRaised]

I’m needing to pick up some mags myself. By poly do you mean the poly/steel mags that are give you trouble or are you using straight poly that is trouble?

It’s the mdt poly mags (no steel at all). I just got two accurate mags in the mail today, I’ll let you know how they work out.

 

[NJRaised]

Cool was just wondering as I have friends that use N135 and 75 ELDs getting 2930fps in 26" barrels. I have some N135 on order but could change to N140 if it seemed to work better but from all my looking around it seems N135 is favored by a little for 75s. Seems like you can't go wrong with either and their burn rates which are close to other known good powders.

I’m gonna work up the powder slowly. I’m a newbie to the reloading game, so I’m being cautious to start. Enjoying it though!

 

[akmike47]

I’m gonna work up the powder slowly. I’m a newbie to the reloading game, so I’m being cautious to start. Enjoying it though!

I may have hugged a tree with my first round after I started loading

Guy got in my head asking me 1000 questions, I said fuck it I'm putting a tree between me and the shit first round.

 

[Rob01]

I’m gonna work up the powder slowly. I’m a newbie to the reloading game, so I’m being cautious to start. Enjoying it though!

Always good to be cautious. I wasn’t trying to push you but just trying to get some info on a powder I haven’t used.

 

[NJRaised]

Always good to be cautious. I wasn’t trying to push you but just trying to get some info on a powder I haven’t used.

Oh no worries! No offense taken! I appreciate the help !

 

[NJRaised]

Always good to be cautious. I wasn’t trying to push you but just trying to get some info on a powder I haven’t used.

You shoulda seen me. I practically had bomb squad suit on.

Basically said goodbye to my rifle before I squeezed it off.

 

[NJRaised]

Accurate mags for the win. Solved all my problems .

 

[03machstock]

Any more load development/ pictures of groups? I just ordered an origin barreled action from pva in .223 and this thread has me excited.

 

[Baron85]

Im having excellent results with n140 as well. Running it in my 24” lilja AR 24.4 gn with 75 bthp at 2828. and 26” osprey tikka with 75eldm at 3012.

Both hammer.

 

[Rob01]

Any more load development/ pictures of groups? I just ordered an origin barreled action from pva in .223 and this thread has me excited.

I am sure you will be more than happy with it. What barrel length and contour you go with?

 

[03machstock]

I am sure you will be more than happy with it. What barrel length and contour you go with?

26” heavy Palma

 

[Rob01]

Good choice.

 

[NJRaised]

Mines a 24” heavy palma, 1:7 twist.

It is still loving the hornady 75 BTHP.

I got out to our swat range yesterday and took it out too 400yds. I put down five, 5 round groups. The biggest group was 2.3”.

This thing is everything I hoped it would be.

 

[Travis T]

Accurate mags for the win. Solved all my problems .

This is great info for me - I have an Origin and 223 prefit inbound and still deciding on chassis (either KRG W3 or MPA BA comp) and have come across some having mag issues, at least w/ the MPA. For my other calibers I use MDT metal mags that work great, but its helpful to hear that the Accurate Mags are the way to go with the MPA chassis.

 

[Ty21]

This is great info for me - I have an Origin and 223 prefit inbound and still deciding on chassis (either KRG W3 or MPA BA comp) and have come across some having mag issues, at least w/ the MPA. For my other calibers I use MDT metal mags that work great, but its helpful to hear that the Accurate Mags are the way to go with the MPA chassis.

I have a w3 on my tl3 it’s my favorite chassis and action the chassis is just super comfortable and easy to get behind and the mag well is adjustable a little bit