CVA Accura MR-X 45 Cal Review

[sniper20]

Hey guys,

I posted a few days ago looking for help finding a load for the Accura MR-X 45 cal that I have. I took it out again today, after putting a scope on it and figured I would share my experience I had.

I have tried a few different combinations, but finally found one that is going to work for me.

ALL OF MY POWDER CHARGES ARE BY WEIGHT!

Powder: Triple 7 FFG
Weight: 80 grains
Bullet: Powerbelt 285gr ELR
Primer: CCI Large Rifle Magnum (Variflame Conversion)
Velocity: 1800FPS

This provided me around 2MOA groups, not horrible, not great. Velocity was not where I wanted it to be.

Powder: Triple 7 FFG
Weight: 80 grains
Bullet: Hornady 280gr Boredriver
Primer: CCI Large Rifle Magnum
Velocity: 1750FPS

Groups were around 12" at 75 yards...

Powder: BH209
Weight: 80 Grains
Bullet: Hornady 280gr Boredriver
Primer: CCI Large Rifle Magnum
Velocity: UNK

Groups on this was horrible again, but velocity was right at 2,000FPS. Velocity was where I wanted it, accuracy was not.

Went out again today to try and see if I could find something better. I deep cleaned the rifle, made sure it was good to go with a fresh start. I did some research and found BPI commented on a Facebook post to try 77, 80, 82 and 84 grains by weight of BH209 with Powerbelt ELR's. I decided to put a scope on it since I was shooting a non-magnified Eotech.

I tried shooting 80 grains again with the Boredriver, and it provided me a lot better accuracy than the other day, but was still about 4MOA, not where I wanted it. I then decided to try 77 grains of BH209 and it gave me about 2.5MOA with the Hornady Boredriver bullets. I am still amazed as how the Hornady Boredrivers pretty much fall down the bore. Barely need more than the weight of the rod to push them down. The Powerbelts require just a touch more, but not much. The BH209 powder seems to make it smoother...

The load that performed for me...

Powder: BH209
Weight: 82 grains (again, by weight not volume)
Bullet: Hornady 280gr Boredriver
Primer: CCI Large Rifle Magnum
Velocity: 2030FPS

This load provided me with a 3 shot group, 1.1MOA. I shot 2 shots, they were touching. I fired a 3rd and it was almost touching, but not quote. Definitely the load for this rifle. I did try some mix and match of Winchester 209 primers and then CCI Large Rifle Magnum with the Variflame conversion. I didn't see any sort of a difference in velocity, but I can definitely see the LR primers are hotter (and told more consistent) than the Winchester 209 primers.

I'm hoping this helps someone who needs some help finding a load for their CVA MR-X rifle in 45 cal. If you don't want to weigh the charges, going off the conversion:

82 grains (weight) = Volume x 0.7 (117)

From what I have seen, they say 120 grains is going to be the max charge for BH209 powder, so if you go with that, hopefully it will work well for you. Again, I was getting right at 2,000 FPS, so that should help if you want to make a close drop chart.

 

[HairyScandinavian]

I'm hoping this helps someone who needs some help finding a load for their CVA MR-X rifle in 45 cal. If you don't want to weigh the charges, going off the conversion:

82 grains (weight) = Volume x 0.7 (117)

From what I have seen, they say 120 grains is going to be the max charge for BH209 powder, so if you go with that, hopefully it will work well for you. Again, I was getting right at 2,000 FPS, so that should help if you want to make a close drop chart.

My MR-X manual says max charge of BH209 is 120 for 50 caliber and 110 for 45 caliber.

 

[sniper20]

The original manual I saw said it was 120 grains. However, doing another search, I see in Sept 2024, the manual I found said it does recommend to be at 110 gbv or less.

I do know that using the Powerbelt bullets, I could feel a difference when getting to higher charges. Not sure if Hornady might just shoot different than Powerbelts. Much like Sierra and Hornady and Speer and so on.

The post that BPI outdoors replied to I saw (I believe in 2024) said 84 grains by weight was max charge. Using the 0.7 method, that’s exactly 120 by volume. I’m guessing that one is out dated.

 

[ElDiablito]

82 grains (weight) = Volume x 0.7 (117)

.7 isn’t accurate for the later lots of Bh209. The current conversion factor is more like .801. So 82 grW would be more like 102 grV in a late lot.

 

[sniper20]

I am going to agree with you on that one Sir.

I saw a lot of your comments on other posts and other forums, so glad to see you still going here!

I decided to go look with the one volumetric measure tube I have. It’s a Pyrodex, and I know they are all different. Should be close though…

Measuring 82 grains by weight, pouring into the measure tube, tapping base of the tube on the table a few times, it settles right about 105gbv.