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Load for .338 LM, Berger 300 Hybrids and N570?

Just spun up a new Bartlein (30 in) .338 LM with my son while he's home for the holiday and gonna do some load workup.
We'd been using N565 with 300's to date (300 A-Tips) in the old barrel, he has Berger 300 Hybrids and N570 which I hadn't been able to find previously (had been using H1000 and Retumbo)

Vhitavouri's load data has min/max over a mile wide- from 65 to 85 grains. We do typical OCW workups usually, for those of you using this bullet/powder combination where would you start and what increments to work up?

Pre-fit barrel alignment

So... over the years I've used, removed, installed, replaced a fair few 'pre-fit' barrels - almost all Savage barrel nut style, though. Along the way, via the school of hard knocks, I found out about the joys of barrels... not always pointing where you want them to - as in having to use up most of your windage or elevation (or both) to get the gun zeroed. *Especially* with factory nuts and lugs. Switching to quality aftermarket lugs - surface ground flat and parallel - and aftermarket barrel nuts, with the mating surface machined perpendicular to the axis of the threads, made a *huge* difference. Basically eliminated it, in my experience.

Fast forward to more recently... I've got a couple barrel-nut pre-fits - one a Proof CF, and the other a Shilen, both with aftermarket nuts - and an Origin action. And they both 'point' about 5-6 mils off to the left :oops:

I didn't really notice it at first, because the first scope (Bushnell XRSii 4.5-30x) I had on that gun with the first barrel (Proof CF 6.5CM) had a wider range of adjustment, so I never really bumped into the edge of the range of travel. The second barrel (NSS/Shilen 223 Rem) actually points a little less off to the side, so I didn't notice that one either, even when I changed the scope out for a Burris XTRiii 5.5-30x. But when I swapped back to the Proof barrel, I got it zeroed... but started having all kinds of problems with the scope not following the adjustments, or randomly changing POI.

After taking everything apart - barrel off, rail off, scopes out of the rings, etc. - and not finding anything loose, I put it back together with the Burris scope and Proof barrel. Since it'd been completely disassembled, I figured I'd stick the bore sighter on it, and holy $hit 🤬 I was about 3 clicks off the far left side of the windage travel. Swapped out the Burris for the Bushnell, and while it wasn't up against the edge of it's range, it was definitely way, way further over than I would like. Pulled the Proof barrel and put the Shilen back on. As mentioned earlier, it didn't point *quite* as far over, enough so that the Burris would actually work with it. Barely.

FWIW, both barrels have the nuts (red) loctite'd on, after setting the headspace with the appropriate gauges.

Unfortunately, I don't have a *shouldered* barrel handy for this action to test this out further. Might be able to borrow one from someone local.

I'm *pretty* sure the face of the receiver, the face of the nut(s), and both sides of the lug were as clean as I could get them. Not sure what else might be the culprit as far as pushing both barrels over that far. Or more specifically... I can think of a few things, but I'm really not liking the direction those thoughts are headed.

Curious what else folks here think might be the cause - or the solution.

SOLD **Sold**MPA BA Comp Chassis with Weights and Extras.

MPA BA Comp for a 700 short action. Note, this chassis has not been a safe queen, has dings and scratches but still functions as it should.
I've cut the bag rider to fit the LOP recoil plate assy. to shorten my length of pull.
Everything in the pics are included.

This chassis includes the following...
- night vision bridge
- night vision bridge spacers
- thumb rests
- mpa internal weights (milled to accept larger diameter barrel and thumb rest)
- gray ops external weights
- lug lock system
- cheek riser wheel
- cheek riser collars
- LOP recoil plate assembly.
- original buttstock
- mpa enhanced bag rider (cut to fit LOP recoil plate assy.)
- monopod weight
- screws and inserts for forend

Asking Sold shipped. PP F&F
Let me know if you have any questions.
Thanks


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Anyone using MDT metal/poly mags?

MDT poly/metal mags... Any good?

I have several of MDTs straight poly and straight metal mags and have been happy with them. The hybrid's metal feed lips with weight/noise of polymer body sounded great for hunting and I was thinking about trying them out next time I needed a few mags.

Now I see great prices on the black Friday sale, but they're in the discontinued category which makes me a bit worried that 1) they aren't great and 2) if I like them I won't be able to get more.

I haven't been able to find very much info on them so... Does anyone have an opinion to share?

Firearms Cz 457 at 1 24in barrel

It's never in the box. 24in barrel threaded model. Bought 2 days ago from lgs. I bought it on a whim for an sbr purpose ans opened barrel channel for suppressor fit. It's never been shot. Price includes shipping

675 shipped. I gave 804 for it after tax 2 days ago

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Firearms Sold GAP PPR 6CM

GAP PPR 6mm Creedmoor
600 +/- rounds.
Defiance action/GA Gladius
Sikes rail left side.
Barrel cerocoated by GA
Action bedded by GA

Don't need 2 rifles for no more than I shoot PRS since my Grandbabies are getting older and spending time with them is more important to me.

2400 obo shipped no California or other commie states.

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Optics Burris XTR III 3.3-18x50 illuminated SCR MOA

I have a like new Burris XTR iii 3.3-18x50 illuminated SCR MOA model 201203 up for sale. I mounted the scope in a pair of ARC m brace rings but the scope has never seen the field or been on a rifle that has been fired. No scratches or dings. It’s just a little heavy for my application.

Will come in original box, with original documentation and included extra turret.

I don’t have any previous posts or sales but I’m willing to verify I’m legit however you see fit.

$750 shipped.

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SOLD BA 22 ARC Barrel w/ Gas Block, BCG, ammo, CH and mags

WTS BA 20" fluted 22 ARC barrel with SA adjustible gas block, Odin Works 6.5 G/6 ARC/22 ARC BCG, 62gr ELD-VT, 75gr ELDM and 80gr ELDM, 10rd mags and a PRI M83 Gasbuster big latch charging handle.

Selling as a whole, discounts listed below

Barrel and gas block - $200
BCG - 130
All ammo 25 62gr, 25 75gr 80 80gr - 130
10rd mags - 30
CH - 80
Total - 570
Price drop 400

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SOLD SOLD: Leupold Mark 4HD 6-24x52 FFP PR2-MIL

THIS SCOPE HAS BEEN SOLD: $1,275 shipped to your door CONUS
  1. Excellent Glass and like new condition
  2. Mounted on 22LR for a video review and that's it (~50 rounds)
  3. Selling the 22LR so no longer need the scope
  4. Including bikini lens covers AND IDTS tape for PRS turret marking if wanted
  5. 34mm tube, 52mm objective
  6. Insurance will be extra if wanted (~$20, but will be my cost, so not adding anything)
  7. I always require adult signature
  8. PayPal FF please
Thanks and feel free to ping me with any questions.

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Optics 8 Leupold Scopes + 1 Vortex

- 24X Fine Crosshair Fine Dot Click adjustments with ring marks-$320
- 20X Fine Crosshair Click adjustments with ring marks-$375
- 16X Fine Crosshair w/dot Click adjustments with ring marks-$310
- 10X Duplex Crosshair Target Knobs with Click Adjustments with ring marks-$315
- 8X Fine Crosshair with dot. Target Elevation knob with click adjustment friction windage adjustment with ring marks-$315
- 7.5X Duplex Reticle Friction adjustments with ring marks-$190

- VX3i 4.5-14x50. 30mm tube CDS Dial that has never been used. Side Focus Windplex Reticle Alumina Scope Caps-$550

Vortex Viper 1-4x24 TMCQ Reticle (IMO a reticle doesn't get better then this one)-$295

Not pictured is a 36X Leupold (still mounted to rifle) It is a Fine Crosshair with dot. Target Turrets-$375

Please do not clutter up with a bunch of comments asking me certain things. I can better keep track of who is in line for what by a PM. I guess prices are negotiable but I by no means need to sell any of these. I'm just trying to de-clutter my gun room..

All payment methods are available:
Venmo/Zelle/Ppff/Money Order/Check by Mail.

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