Can not sight in new accura Mr-x (advice needed)

[TonySkyline]

Hello all, I am in a pinch and need some suggestions. I started shooting a new cva accura Mr-x 3 weeks ago. I am starting with imr white hots & triple 7 pellets for powder, cheddite & Winchester primers and for bullets I’ve used the Thor practice bullets 250G. I also have Hornady boredrivers 290G and 1 pack of Federal borelock 270G. Weather has been absolute trash here with rain, wind, & snow so I just got around to pushing it back to 100 yards and got it on paper. First shot I was way left, like 10” which I thought was crazy because I was on at 50 yards last week. I adjust 16 clicks to the right. Second shot today I decided to try out the triple 7 powder (so far I’ve only used white hots). And I’m hitting bullseye at 100. Now I decide to use the real bullets and load up a boredriver. I hit over a foot low! Dead center but a foot low! I take a fourth shot with IMRs and I’m completely off the paper now and not even hitting the box behind the target hardly at this point I’m not adjusting anything. Next shot I try the federal ammo and I’m back on the box but hitting way low and to the right… I am using a lead sled and I feel like the entire time I’ve been chasing. I’d adjust and it starts to come together then a complete stray shot and I start over. Makes zero sense. The first week it felt like I was on track and I haven’t changed anything. But, I did drop the breech plug and it made a dent on the inside that the powder touches. Do yall think that’s what’s causing this nightmare? I’m going to tighten down and level the scope again but i mounted it myself and used loc tite originally so doubt that’s it. So frustrating considering I’ve missed 5 days of a 7 day season already and ready to throw in the towel with muzzleloading if they are seriously this inaccurate but I know something has got to be wrong here. I am a good shot with a rifle and have no problem taking deer out to 500 yards with my 7 rem mag. I’ll include pics. Do I need a new breechplug? I still have the black horn one that came with it (came with both plugs) but not sure if I can use that for pellets and idk if I wanna get into black horn my first year with it honestly.

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[TonySkyline]

I should add that I have cleaned between every shot so far and try to do the same thing every time. 1 swipe with bore snake. 4 swipes with wet patch and 4 dry. I also clean breechplug & make sure I can light through it. End of each session I let the plug and firing pin/spring all soak and really clean it up good and make sure it’s 100%. I also adjusted the fore end to ensure it’s not super loose. Idk what else to do at this point. I’m at about 20 shots and it’s all over the damn place. Using a Nikon prostaff 3-9x50 scope for reference (it’s actually awesome for a muzzleloader so I hope it ain’t that).


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[SwampDonkey55]

I’m fairly new to (serious) muzzleloading so I’m no expert but I do know that they’re super finicky shooting a mismatch of powders/sabots. I would pick one type of powder and one type of sabot (especially same weight) to shoot consistently with to get zero and go hunting for your muzzleloader season

Also when I sighted mine in a few weeks ago I had sabots flying all over the place and I wasted a bunch of powder before I realized I wasn’t pushing the sabot down far enough so make sure when you’re seating the sabot tight against the powder but you’re using pellets so it would be easier to tell when it’s fully seated against the pellets I would think


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[Chad E]

I don't think the dent in the breech plug is the issue unless it's alowings blowback through but if it gives you confidence the blackhorn one will work with what your using. I'll be honest I'm betting on scope and mounting being the issue along with too many variables including bullet and powder switches ( based on your top post) being your issue. Keep things consistent and try to isolate the issue.

 

[KChunter71]

I think your powder or breech plug hole is getting wet from all the cleaning. The gun is firing but it’s changing speed and point of impact on you. Are your primers 209 magnums? My dad, uncle, and buddy shoot Accura’s, 777 100gr volume, hornady 250gr sst sabot, cci mag primers. Only clean if it’s hard to load. 777 will be sooner than the blackhorn 209 I use. If you have cleaned it (wet) fire a couple 209’s from it. Something is remaining wet and changing your velocity/point of impact shift. Don’t worry about the zero. Just see if you can get it to group.

 

[TonySkyline]

She looks pretty level still as far as the scope goes. I’m going to go ahead and tighten down as well as the rings to the base just to rule it out. The bell is pretty dang close to the barrel on this (large 50mm). You can definitely fit paper between it but I can’t get a cap on the front. Using medium vortex pro rings . Hoping the recoil isn’t throwing the scope off. Also wondered about it being in the lead sled. I’ve read somewhere that you shouldn’t tighten it down and shoot out a sled. I’ve used the sled and a tripod with same results from both. I do not tighten the strap down when it’s in the sled.

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[Jmort1754]

My mrx shoots everything well.

I do shoot blackhorn in it but it does shoot white hots great as well.

No reason to clean every shot,
Pick one powder and one bullet and go from there see if it will group or if its all over.

Tear the scope down and remount it, just because it's level doesn't mean its tight.

Throw the sled in the trash

 

[dsotm]

Ditch the lead sled, stop cleaning every shot. Either your getting the powder wet, scope is loose, scope is damaged.

 

[ElDiablito]

Agree with most of the comments. Welcome to muzzleloading. Little things make big differences. Consistency is key.

Ditch the sled (you’ll wreck your scope with that thing if you haven’t already)
Pick a combo and stop switching back and forth.
Zero reason to clean between shots.
The sealing surface of your plug may very well be compromised by that damage (use the BH209 plug)
Seat your bullets on the pellets but not too hard or you can crush them which will dramatically alter their combustion.
That’s a pretty low end scope - I wouldn’t be surprised if it’s trashed already.