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Post by killbrew on Oct 16, 2023 18:03:03 GMT -5
I received in 3 CVA scout v2 45-70 conversions last week, outfitted them with hanks optic rail, bedded as shown in his install video. lapped scope rings etc.
These barrels are very choked. Looking for load advice. By sizing the bullets to be able to load with 2 finger pressure I am getting failure to fires, the primers are striking though.
Used Fury 275 and hornady ftx 250.
I finalized sizing down to .450 as this was the smallest I could get to actually have a successful bang. With that being said it takes a little assistance from a mallet to get the bullet seated.
One gun was shooting 62 gr imr4198 at about 4 MOA Horizontal stringing and 2moa vertical stringing.
The second gun shooting 64 gr imr 4198 was about 2 MOA
The 3rd guns hammer wouldn't cock back. Thinking we need to file a little bit of the Lug
Other info
CCI 250s
IMR 4198
No wad
Questions
Which is my best path forward? thinking sabots maybe the way to go?
What would a barrel lap look like to get rid of the choke?
Has anyone had experience with a hammer not cocking? Is the fix to file some of the lug?
What is the best way to get the shell ejector out of the way when removing the threaded plug?
TIA
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Post by Kyle on Oct 16, 2023 18:38:11 GMT -5
I received in 3 CVA scout v2 45-70 conversions last week, outfitted them with hanks optic rail, bedded as shown in his install video. lapped scope rings etc. These barrels are very choked. Looking for load advice. By sizing the bullets to be able to load with 2 finger pressure I am getting failure to fires, the primers are striking though. Used Fury 275 and hornady ftx 250. I finalized sizing down to .450 as this was the smallest I could get to actually have a successful bang. With that being said it takes a little assistance from a mallet to get the bullet seated. One gun was shooting 62 gr imr4198 at about 4 MOA Horizontal stringing and 2moa vertical stringing. The second gun shooting 64 gr imr 4198 was about 2 MOA The 3rd guns hammer wouldn't cock back. Thinking we need to file a little bit of the Lug Other info CCI 250s IMR 4198 No wad Questions Which is my best path forward? thinking sabots maybe the way to go? What would a barrel lap look like to get rid of the choke? Has anyone had experience with a hammer not cocking? Is the fix to file some of the lug? What is the best way to get the shell ejector out of the way when removing the threaded plug? TIA If your barrels are very choked at the muzzle, you may want to consider lapping the section of the barrel that is choked. Another alternative is shooting a projectile with a sabot. The sabot has some ability to spring back after it makes it through the tight spot. You may also want to check out this prior thread: hanksmessageboard.freeforums.net/thread/6409/gun-won-bang |
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Post by SURESHOT on Oct 17, 2023 6:35:51 GMT -5
I received in 3 CVA scout v2 45-70 conversions last week, outfitted them with hanks optic rail, bedded as shown in his install video. lapped scope rings etc. These barrels are very choked. Looking for load advice. By sizing the bullets to be able to load with 2 finger pressure I am getting failure to fires, the primers are striking though. Used Fury 275 and hornady ftx 250. I finalized sizing down to .450 as this was the smallest I could get to actually have a successful bang. With that being said it takes a little assistance from a mallet to get the bullet seated. One gun was shooting 62 gr imr4198 at about 4 MOA Horizontal stringing and 2moa vertical stringing. The second gun shooting 64 gr imr 4198 was about 2 MOA The 3rd guns hammer wouldn't cock back. Thinking we need to file a little bit of the Lug Other info CCI 250s IMR 4198 No wad Questions Which is my best path forward? thinking sabots maybe the way to go? What would a barrel lap look like to get rid of the choke? Has anyone had experience with a hammer not cocking? Is the fix to file some of the lug? What is the best way to get the shell ejector out of the way when removing the threaded plug? TIA I will give you my expirence on a couple questions asked, I only use 275 gr Pittmans, FIt the bullet to the muzzle start it with a 6 inch starter rod then push it down with the ramrod. Now I pour the powder, install a wool wad, then the bullet all thru the funnel, as the bullet goes down it's real easy to push down after the 6 inches, Hammer not Cocking, that was an issue for me on the first one we purchased, I sent the breech plug back to my builder and he removed 1 to 2 thosands from the schoulder of the breech plug (flange on breech plug) allowing the plug to screw in further that fixed the problem, cocks every time now, may or may not be your problem. the ejector, I tap the pin out enough to slide the ejector out, not taping the retaining pin all the way out, and as you pull the ejector out be careful there is a SMALL spring that rides in a hole on the ejector facing towards the barrel. This pin holds the ejector in place takes a 1/16 / 1/8 punch to tap it out just pass the ejector to slide out I put a little grease in hole to hold the spring in place and the spring will not fly out. I went to this gun to stay away from the SABOTS so far so good, ( insure the BREECH PLUG is in good and tight, 1/4 inch drive |
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Post by james72 on Oct 17, 2023 21:27:59 GMT -5
I had similar problems initially with my Scout. Some barrels are choked worse than others I believe. Below is a post I made after lapping my barrel.
I finished lapping my barrel this week, so I wanted to post an update. I hand lapped the barrel using 400 grit lapping compound and a tight fitting patch. I used a 45 caliber bronze brush wrapped with a 2-3/4" square cotton patch. First I lapped the tight end (last 6" of the barrel from the muzzle). Once this section matched the middle section of the barrel, I extended my stroke another 6". I stopped several times during the lapping process to clean, check bullet fit, and then lap again. It was a laborious process but worth it in the end. Your patch needs to be really tight. It should take some muscle to move it. When your barrel gets warm you will know you are making progress. How much metal did I remove? Only a guess, but maybe .0001 or .0002 from the lands. My bullet now sized at around .4505 loads with consistent pressure from muzzle to breech. How did it shoot? Better than before. After finding the right combination, I had several groups below 1" at 100 yards.
Also I believe your problem with the hammer not cocking is because your breech plug isn’t screwed in all the way. Remove it and clean the plug and threads really good and try again.
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Post by killbrew on Dec 4, 2023 17:12:38 GMT -5
Update
Failure to cock:
After firing about ~50 shots in my gun I swapped the action with the gun that wouldn't cock, it now cocks no problem, assuming a minor tolerance stack somewhere. (Sorry this wont really help people with one rifle to try, not entirely sure where the issue was stemming from.)
Previously I had also tried removing the plug entirely and cocking in the other 2 guns we had, and it wouldn't cock in any 3 guns even without the plug in.
Loads:
I bought some sabots to try in the rifles and the first gun we shot was the virgin gun that previously wouldn't cock. Using a harvester crush rib, Fury .40 Star Tip MZ and 60 grains of 4198 it is shooting about a .75 Moa group. Very happy with that, No mallet required to load lol.
Moving on to the 2 previously shot rifles we tried the same load and got about 2 MOA groups, this will be fine for Late muzzleloader in January here in Iowa but I am for sure going to keep tinkering with those 2 loads. I might of screwed the barrels up a little bit by giving the bullet a little love from the mallet.
I ordered some wads and a couple other bullet combinations to try in the future.
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Post by buckeye68 on Dec 4, 2023 17:59:29 GMT -5
Thanks for the update.
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sqezer
Junior Member
Posts: 83
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Post by sqezer on Dec 4, 2023 18:20:27 GMT -5
I must be one of the lucky one's with the CVA SCOUT 45-70 conversions after getting it back from Hank, I first installed the cleaning tool then lapped the barrel from the breech to the muzzle. Cleaned everything up really good, took some of my Parker 250 BE and sized them so I could push them down with 2-3 fingers. I started with 54 gr then 55 gr and settled with 56 gr. IMR 4198 wool wad and the 250 BE to get on target then switched to the Parker 275 Black Max. It shoots ragged hole groups at 100 yds. Loads smooth as silk from the muzzle to the bottom.
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Post by buckeye68 on Dec 4, 2023 20:11:54 GMT -5
I must be one of the lucky one's with the CVA SCOUT 45-70 conversions after getting it back from Hank, I first installed the cleaning tool then lapped the barrel from the breech to the muzzle. Cleaned everything up really good, took some of my Parker 250 BE and sized them so I could push them down with 2-3 fingers. I started with 54 gr then 55 gr and settled with 56 gr. IMR 4198 wool wad and the 250 BE to get on target then switched to the Parker 275 Black Max. It shoots ragged hole groups at 100 yds. Loads smooth as silk from the muzzle to the bottom. Lucky? I don’t think so. IMO you’ve done everything the right way. I’ve done almost the exact same thing as you have to every CVA Scout that I’ve own. They have all shot one hole at 100 yards. Is any CVA Scout perfect? Nope, but with a little elbow grease they can be real sleeper for the money! |
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sqezer
Junior Member
Posts: 83
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Post by sqezer on Dec 4, 2023 20:26:54 GMT -5
I must be one of the lucky one's with the CVA SCOUT 45-70 conversions after getting it back from Hank, I first installed the cleaning tool then lapped the barrel from the breech to the muzzle. Cleaned everything up really good, took some of my Parker 250 BE and sized them so I could push them down with 2-3 fingers. I started with 54 gr then 55 gr and settled with 56 gr. IMR 4198 wool wad and the 250 BE to get on target then switched to the Parker 275 Black Max. It shoots ragged hole groups at 100 yds. Loads smooth as silk from the muzzle to the bottom. Lucky? I don’t think so. IMO you’ve done everything the right way. I’ve done almost the exact same thing as you have to every CVA Scout that I’ve own. They have all shot one hole at 100 yards. Is any CVA Scout perfect? Nope, but with a little elbow grease they can be real sleeper for the money! |
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sqezer
Junior Member
Posts: 83
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Post by sqezer on Dec 4, 2023 20:33:09 GMT -5
I just got off the phone with my son, I bought him a CVA Scout 45-70 for his Birthday in May and he's getting ready to send it off to Hank for the conversion. With any luck it'll be as good as mine. He'll be able to handle recoil better than me at 6'1 and 275 lbs and me at 5'8 and 230 lbs.
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Post by lbahunter on Dec 5, 2023 13:04:40 GMT -5
When I got my Scout back, the only thing I done was clean it real good.(no lapping) Before I started shooting, I ran a few patches with alcohol to clean the barrel of oil. I started with sabots and still use sabots. I have tried sabotless but have no problems with the barrel being choked. I could probably lap the barrel to make it more smooth. Everything, I've shoved down the barrel of my Scout, be it sabotless or sabots, has shot very well.
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