My Marlin 1895 GBL won't chamber the Jae-Bok Young's 550 g. Craters I just purchased. I think it has something to do with o-give of this round. I can't fully close the lever with these rounds. I haven't found much info on what the OAL should be. When I crimp on the cannulure it comes out to 2.530. I have tried the OAL from 2.520 to 2.560 and it still won't fully chamber. I have compared this bullet with some 525g. Beartooth's (which chamber just fine) and the Beartooth has a diameter of .455 just in front of the cannalure and the Crater has a diameter of .453 in front of the cannulure. Please tell what I'm missing here! Has anyone else had trouble with these bullets?
Problem chambering Jae-Bok Young's 550g. Crater bullet
- Thread starter dsv424
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They are made to be crimped in the crimp groove...your OAL is OK...2.54" - 2.55" is the general OAL for 1895's.
Color one with a sharpie or magic marker, try to chamber it...and see where its marking the bullet.
You can do that without the color too...but you might need to put a lil pressure on the lever to mark the bullet good (they are kinda hard)
Color one with a sharpie or magic marker, try to chamber it...and see where its marking the bullet.
You can do that without the color too...but you might need to put a lil pressure on the lever to mark the bullet good (they are kinda hard)
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Once I find out where it is marking the bullet what are my options from there?
In addition, there is one other bit of info I failed to mention in my first post. I made 10 of these rounds to try out all set with an OAL of 2.53. At the range I loaded 2 and shot them with no problems. I then moved on to a couple of other bullets I made to check out which worked just fine. I then returned to the 550 Craters and that was when I could no longer chamber them. When I got home I tried several different bullets which all chambered fine except for the Craters again. Don't know if any of this rambling on about exactly how it occurred will shed any light but I thought I should include exactly what happened.
In addition, there is one other bit of info I failed to mention in my first post. I made 10 of these rounds to try out all set with an OAL of 2.53. At the range I loaded 2 and shot them with no problems. I then moved on to a couple of other bullets I made to check out which worked just fine. I then returned to the 550 Craters and that was when I could no longer chamber them. When I got home I tried several different bullets which all chambered fine except for the Craters again. Don't know if any of this rambling on about exactly how it occurred will shed any light but I thought I should include exactly what happened.
Clean the crap out of the chamber and rifling leade with a bronze bore brush & solvent.
You may have got leading or powder fouling in the rifling leade from the other loads you shot, and it is interfering with the full dia 550 grain bullets chambering all the way.
rc
You may have got leading or powder fouling in the rifling leade from the other loads you shot, and it is interfering with the full dia 550 grain bullets chambering all the way.
rc
243winxb
Member
Looks like there are 2 bullet in 550gr. What 1 do you have?
http://www.competitor-pistol.com/jb%20home.html
http://www.competitor-pistol.com/jb%20home.html
If they chambered the first time, RC would have the answer.
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SSN Vet
Member
I have the bullet on the left side of the picture, which is definately the one for 45-70 Marlin. This gun is less than a month old and has not even had 50 lead bullets through it. I clean after each use which has been 4 times now. I picked some new bronze brushes for it today and am using Butches Bore Shine. I really can't see any kind of build up in the throat area but I will scrub it really good tonight and let the Bore Shine soak in for a while and see what happens.
I tried shortening the OAL tonight and found when I got to 2.470 I could close the chamber with slight pressure and when I got down to 2.450 it closes with ease. But this seems way to short to make the round.
I tried shortening the OAL tonight and found when I got to 2.470 I could close the chamber with slight pressure and when I got down to 2.450 it closes with ease. But this seems way to short to make the round.
When you can see exactly where its catching...you'll have a better idea of what the problem is.
One thing you might wanna check is the nose length of those bullets...accidents do happen.
One thing you might wanna check is the nose length of those bullets...accidents do happen.
It is catching right were the chamber(throat) meets the barrel. There were six marks on the bullet from the grooves. However after cleaning and scrubbing I have managed to close the chamber. I found that if I am fast and somewhat firm with the lever it closes every time. I'm still a bit concerned because I have to be more deliberate with the lever to close the chamber which makes bullet snug in the rifle grooves. Is this acceptable because I don't have to do this with any other bullets I have made? Please excuse my ignorance here but I never owned a lever gun before.
I haven't tried the Craters yet myself...but take that info over to MarlinOwners forum and ask the question there.
I know my way around lever guns and 45-70's...but there's a few guys over there that have forgotten more than I'll ever know...and they have used the Craters.
With that said...I don't think the bullets should be jammed into the rifling upon chambering.
I shoot mostly 405 Beartooth LFN/GC's myself, but I have done some research on the Craters...and I think I remember reading of this issue before but I don't remember where.
I know my way around lever guns and 45-70's...but there's a few guys over there that have forgotten more than I'll ever know...and they have used the Craters.
With that said...I don't think the bullets should be jammed into the rifling upon chambering.
I shoot mostly 405 Beartooth LFN/GC's myself, but I have done some research on the Craters...and I think I remember reading of this issue before but I don't remember where.
243winxb
Member
Use 2.450" as your OAL. Seating the bullets deeper to keep the nose out of the leade/rifling is the correct way. For top accuracy, a tiny amount of jam into the rifling can work, but as dirt builds up it becomes a problem. Very hard lead bullets are not forgiving when contacting the rifling. The nose diameter of cast bullets can change slightly from lot to lot or cavity to cavity, depending on alloy used and mold temeratures.
The web site shows two bullet seating lengths one for single shot and one for lever guns. The single shot is crimped in the crimp groove and the lever is crimped above the shoulder.
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Well, I have figured out what is causing my problem. Now I need some expert advise on what to do to correct the problem.
I measured the diameter at the ogive on all 50 bullets and found that 29 of them measured between .450 and .451. All of those I can set the OAL at 2.520 and they chamber just fine. The remaining 21 bullet measured at .452 to .454. The ones that measured at .452 I can still close the lever on but with a bit of force because they are digging into the rifling. The ones that measured at .453 or .454 won't allow me to close the lever. The only way I can chamber them is to shorten the OAL to between 2.480 and 2.450. Is this an acceptable fix to this problem or will I be running into excessive pressure problems with this shorter OAL? BTW, has anyone ever seen such a wide variance in bullet diameter like this before. I don't know anything about casting bullets so I wouldn't know how this could happen. Also, I tried out 5 of the rounds that would chamber and they sure are a blast to shoot!
I measured the diameter at the ogive on all 50 bullets and found that 29 of them measured between .450 and .451. All of those I can set the OAL at 2.520 and they chamber just fine. The remaining 21 bullet measured at .452 to .454. The ones that measured at .452 I can still close the lever on but with a bit of force because they are digging into the rifling. The ones that measured at .453 or .454 won't allow me to close the lever. The only way I can chamber them is to shorten the OAL to between 2.480 and 2.450. Is this an acceptable fix to this problem or will I be running into excessive pressure problems with this shorter OAL? BTW, has anyone ever seen such a wide variance in bullet diameter like this before. I don't know anything about casting bullets so I wouldn't know how this could happen. Also, I tried out 5 of the rounds that would chamber and they sure are a blast to shoot!
That much variation in bullet ogive dia would have to be caused by one of a few things.
A multiple cavity mold with one cavity bigger then the rest.
Or, variations in filling a single cavity mold due to:
Temp swings in the casting pot.
Or different alloy mixtures that didn't shrink as much.
I believe I would contact Mr. Jae-Bok you bought the bullets from and ask for a replacement shipment.
rc
A multiple cavity mold with one cavity bigger then the rest.
Or, variations in filling a single cavity mold due to:
Temp swings in the casting pot.
Or different alloy mixtures that didn't shrink as much.
I believe I would contact Mr. Jae-Bok you bought the bullets from and ask for a replacement shipment.
rc
Asherdan
Member
243winxb
Member
I would contact Mr. Jae-Bok for advice. Or post over at cast boolits. http://castboolits.gunloads.com/forumdisplay.php?f=8 Very large bullets have there own problems. They cast & cool differently in the mold. Some molds are nose pour. Jae-Bok Young's bullets are "heat treated" after casting. Bullets are reheated in an over for 1 hr at about 450 degrees, then placed in cold water to harden them.
It would help to know what powder & amount you are loading. My old Lyman book has data for 482 & 552 gr cast bullets for the 45-70
Smaller cast bullets for the most part do not vari .004" on the bearing surface body as the drop from the molds. Sometimes a mold will not close fully, this can give an out of round, larger bullet. Very few cast bullet are round as cast, sizing corrects this on the body. But nothing can be done about the nose.
My guess is > If you seat deeper without compressing the powder charge, while reducing the charge, you may be OK.
It would help to know what powder & amount you are loading. My old Lyman book has data for 482 & 552 gr cast bullets for the 45-70
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243winxb
Member
Good Reading
Good reading here if you missed it. http://www.competitor-pistol.com/45-70%20page6.html
Good reading here if you missed it. http://www.competitor-pistol.com/45-70%20page6.html
Thanks guys for the advise. I have been e-mailing Mr. Young about the situation and he has been very quick with his responses. I just wanted to "bounce" my dilemma off a few of you guys before I spoke again with Mr. Young. Plus, as I said I know nothing about casting bullets and what it all entails or what I described could actually occur. The bullets I have loaded and had good success with were loaded with 36.8 g. H332 with Rem. 91/2 primers at an OAL of 2.520 and case length of 2.095. I will probably return the rest to Mr. Young so he can confirm what I have found and hopefully replace them.
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