Re-boring Lyman Trade Rifle Barrel

Discussion in 'The Gun Builder's Bench' started by erhunter, Aug 12, 2019.

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  1. Aug 12, 2019 #1

    erhunter

    erhunter

    erhunter

    32 Cal.

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    I am looking for information on Bobby Hoyt"s gun shop. I have his address and phone number but I can't get a hold of him for what he charges for re-boring from a 50 to 54 cal. and changing the rate of twist and groove depth. How do I send my barrel to him? Thanks for any response!
     
  2. Aug 12, 2019 #2

    SDSmlf

    SDSmlf

    SDSmlf

    40 Cal.

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    Call him early in the day before he starts up his machines. His is a working shop without a receptionist to answer the phone. Let it ring and he will answer. He has done a few for me and they are shooters. Believe his current price is $150 including return shipping.
     
  3. Aug 12, 2019 #3

    erhunter

    erhunter

    erhunter

    32 Cal.

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    Thank you for your quick reply! I have had this Lyman Trade rifle since 2001 and can't get this thing to shoot accurately. The lands keep cutting the patches. I tried lapping and every patch,powder combo out there. Also the bore isn't consistent through the barrel. It has a tight spot at muzzle then opens up to the middle, tightens up and opens up the rest of the way! Any suggestions on groove count and depth along with twist rate for .390 Hornady round ball and .018 patch?
     
  4. Aug 12, 2019 #4

    erhunter

    erhunter

    erhunter

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    Sorry I meant a .530 round ball, not a .390! Just a brain fart.
     
  5. Aug 13, 2019 #5

    SDSmlf

    SDSmlf

    SDSmlf

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    I’ve got two Renegade barrels that were rebored by Mr Hoyt to 58 caliber, 1-60 twist, radius bottom grooves, one each in flint and percussion. Have been putting time in with the flint. Last year at this time I was getting 2-1/4” groups or so off the bench at 100 yards.

    After last hunting season, thought I’d try a Lyman 57 peep sight paired up with a Lyman globe front sight and suddenly I was consistently getting 1” or a tad better groups. 80 grains Swiss fff, .565 weighed roundball, denim patch material (nominal .022, compressed .0155) dry lubed 7:1. Basically following Dutch’s system (http://www.blackpowderrifleaccuracy .com/ or PM him, Dr5x on the forum). Knowing what the barrel could shoot, I tried a partridge style rear sight with a wide front sight and surprised myself with a five shot group right at one inch recently. Now I have to see if this sight setup will work for in hunting conditions. Fingers crossed.

    My suggestion is that when you get Bobby on the phone, tell him what you want to do and ask for his recommendation. He suggested the 1-60 radius bottom rifling I am using in my 58 caliber barrels, and I couldn’t be happier. Do as he says and the rest will be up to you. Here is a what the rifling looks like. upload_2019-8-12_22-44-34.jpeg
    As far shipping, figure $15 when using the USPS. Have shipped two barrels in the past month through them without issue.
     
    Last edited: Aug 13, 2019
  6. Aug 13, 2019 #6

    erhunter

    erhunter

    erhunter

    32 Cal.

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    Thanks for your reply SDSmlf! I just talked to Mr. Hoyt this morning and he suggested 1;60 twist, 7 groove/land for reboring to 54 cal. I just mailed the barrel for $9.80 USPS and asked him to do whatever is necessary for accuracy. I went to Dixon's also and I have sharp edges that keep cutting my patches. He said when Mr. Hoyt is done with the barrel it will be match grade. I also sent info to Hoyt on round ball size (.530) I will probably be using with 80 grains Goex FFG. Did he crown the barrel for you? How much extra $ was it?
     
  7. Aug 13, 2019 #7

    erhunter

    erhunter

    erhunter

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    Also, I'm glad your barrels worked out for you. Mine has been cutting patches since 2001 and tried lapping, etc. I hope this finally works. I like a rifle as accurate as I can get, we owe it to the animals we hunt for a clean kill.
     
  8. Aug 13, 2019 #8

    SDSmlf

    SDSmlf

    SDSmlf

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    I crowned and added the two concentric cuts on the muzzle of the previously pictured barrel with a lathe. The crown was cut at 60°.

    I also polished the transition from the crown to the rifling with wet sandpaper and a number of progressively sized ball bearings. Do the polishing thing with all my barrels. Below is a photograph of one I am in the process of polishing. Don’t know if it is really necessary, but I don’t have any barrels that damage patches at the muzzle. upload_2019-8-13_16-34-14.jpeg

    Call Bobby and tell him want you want. He has to cut a crown anyway. And he has been very accommodating to requests I have made.
     
    Last edited: Aug 13, 2019

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