View Full Version : New Crown
Rifleman
05-11-2018, 02:48
I decided that it was time to do the crown on the 5.7 HRA. It has a MW of .5 but shoots terrible and will only hold the 7 ring...sometimes. I have tried everything else to make it shoot with no luck so we will see how this works out. The tool I used is the M1 Garand Three-Faceted (1964) Crown Tool from Pacific Tool and Gauge. Here are the before and after. I will post a range report next week.
4357143572
Looks pretty nice.
Have been using the Dave Manson crowing kit for a few years. Makes a significant difference it the crown was bad.
Semper Fi
Art
Just found this post. Will follow thread with interest. Sincerely. bruce.
Rifleman
05-11-2018, 06:58
Art I have looked at the Dave Manson crowning kit and it is on my wish list for sure. Bruce I'll hit the range Wednesday, if not then Thursday for sure.
with how that original looked, im guessing you made an improvement.
A pretty crown isn't going to fix an accuracy issue. Far more to accuracy than the crown. And that one doesn't look bad. How's the trigger, sights and bedding?
"...the 7 ring..." On which target?
Rifleman
05-15-2018, 05:31
The target is a SR1 @100 yards. The rifle has received the works trying to correct the issue including a parts swap with another rifle to no avail. Well, it has a new crown now so we will know the answer to that for sure tomorrow or Thursday.
Rifleman
05-16-2018, 03:24
Ok...Today I was able to make it to the range a test the new crown with one change in the plan. I had a second rifle that was not a very good shooter so I decided to do the crown on it also. I did not think that it would be fair to only do one rifle then give a report if the results where negligible or made it worse.
So the rifle that started this post (HRA 5709150) now shoots a 2-3/4" group. As mentioned above it was wild and as I was re-cutting the crown I could see that the muzzle was not square which explains why it was throwing bullets wildly to the left. It has it's factory SA barrel which was surprising to me, I would not expect that from SA.
HRA 5709307 was next. Before it was re-crowned it would shoot a 5" group with a crazy flyer every few shots, a poor shooter for sure. But it had a MW of 1.5 and a bright bore and original HRA barrel and like 150 I had done everything I could think of to get it to shoot. It now shoots a sub MOA group, shocking. Both where fired using a bench rest @ 100 yards using SR1 targets.
Really what is there to say, I had two terrible shooters, did a re-crown and now they are ready to shoot a match. The results speak for themselves and it is very easy to do. I have been into M1's for 25 years but this is the first time I have done a re-crown and frankly that was a mistake. Only someone with a very keen eye would ever be able to tell it was done. I am planning to do a couple more M1's and I'll take pics along the way and do a post on that so you can see how easy it is to do and that the process is really fool proof.
P.S. Ammo used was PPU.
4358743588
You have learned one of the simplest ways to improve most rifles accuracy. Sometimes, all that it takes is a simple nick in the crown of a barrel to throw things off.
Even the rounded edge that happens in time to all crowns is easily cleaned up to, better than issued condition at times.
Semper Fi
Art
Another reason to like flash hiders on the newer models.
Rifleman
05-16-2018, 07:18
Art I wish I would have listened a long time ago....
PA28R200
05-17-2018, 04:56
On the recrowning I have done, including match grade barrels, I chuck them in a lathe and use a single point tool to cut them.
They are in a four jaw chuck, are indicated to .0005 then cut.
Works great this way.
You have learned one of the simplest ways to improve most rifles accuracy. Sometimes, all that it takes is a simple nick in the crown of a barrel to throw things off.
Even the rounded edge that happens in time to all crowns is easily cleaned up to, better than issued condition at times.
Semper Fi
Art
agree. i have even seen 1911 barrels recrowned that looked pretty good to the eye, and it made a signifigant difference.
Re: Range Results. Simply outstanding! So very glad the crowning job gave such very good results! Sincerely. bruce.
snakehunter
05-24-2018, 03:37
You have learned one of the simplest ways to improve most rifles accuracy. Sometimes, all that it takes is a simple nick in the crown of a barrel to throw things off.
Even the rounded edge that happens in time to all crowns is easily cleaned up to, better than issued condition at times.
Semper Fi
Art
I have a Savage Tactic that shoots .5moa. 2yrs ago the groups opened up to 1.1 so I had it re-crowned and it went back to .5 The problem was an almost invisible nick.
The Manson kit is one of the best investments for shooting accuracy that I have made.
http://i1180.photobucket.com/albums/x413/nf1e/IMG_1069_zpsyedachz3.jpg (http://s1180.photobucket.com/user/nf1e/media/IMG_1069_zpsyedachz3.jpg.html)
Semper Fi
Art
Punch the Clown
06-02-2018, 04:37
Just don't re-crown every range trip or you'll run out of barrel mighty fast. I have used the Manson kit and it is a well made. Thanks for the report.
I need to invest in that kit for my Kimber 82
I need to invest in that kit for my Kimber 82
Used it on my 82. Makes bench rest fun again.
m1ashooter
06-03-2018, 10:49
I just saw he makes a basic kit for $135.
The Manson kit is one of the best investments for shooting accuracy that I have made.
http://i1180.photobucket.com/albums/x413/nf1e/IMG_1069_zpsyedachz3.jpg (http://s1180.photobucket.com/user/nf1e/media/IMG_1069_zpsyedachz3.jpg.html)
Semper Fi
Art
Which kit is pictured? Is it the Military Rifle Re-Crowning Tool ?
Phil McGrath
06-03-2018, 06:05
I like the crown from the PTG set up. If it was done by a first time user, that's a clean job. Touch it up with some cold blue and your done.
Which kit is pictured? Is it the Military Rifle Re-Crowning Tool ?
11 deg full target kit. This setup has been used on plenty of my military shooters with super effects.
If you are on the business end of a military rifle barrel, the last thing you should be thinking about is the crown.
Semper Fi
Art
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