Author Topic: 243 ultra accuracy (Read 547 times)

dlcr · « **on:** December 13, 2005, 04:12:04 AM »

Hi everyone,I've been reading here awhile but just registered so this is my first post.I have a 243 ultra varmint that I've been working on for some time,and haven't had much luck.I've fire lapped the bore,done the o-ring thing as well as several of the other fixes that I've read here,and still can't get anything to print consistently 1 moa or under.I tried fed fusion and experimented extensively with reloading varying bullet weight,powder,primers,bullet brands,resized over for a little tighter fit in the chamber etc. different brands of factory ammo and always resting the stock close to the action haven't helped either.The barrel cleans like a dream since the fire lapping but the best consistent accuracy I've been able to achieve is 1-1/4 to 1-1/2.I shot a few tiny groups with some sierra 100 gr bullets that had been moly-coated but haven't been able to find any more.Oh ,but I did learn one thing,the brass stretches in the chamber so much that if reused to many times the case head will seperate.Does anyone have any fresh ideas?THANKS.

bladerunner · « **Reply #1 on:** December 13, 2005, 04:58:33 AM »

dlcr,WELCOME TO THE FORUM

I can only think of a couple of things you didn't mention....

1.Have you checked the barrel latch?the sticky's will tell you how.....but it sounds like you've read the sticky's :grin:

2.check to see if the muzzle end is larger than the breech end....you can do this by puttind a tight cleaning patch in the barrel from the breech end and pushing to see if it gets looser at the muzzle..there's another way,by slugging the barrel,involves putting a piece of lead down the barrel....but since i don't know the exact procedure,I won't recommend it

3. take the forearm off with the barrel locked up and see if there is any play in the barrel

4. the crown could have an imperfection,too...visibly inspect it....then clean it thoroughly..after cleaning,keep testing..after about a box and a half of shells,there should be a "starburst" if you look at the muzzle from the powder buildup.....make sure it's even

that's all i can think of at the moment.....GOOD LUCK!!!

Norseman112 · « **Reply #2 on:** December 13, 2005, 05:14:00 AM »

Welcome to GB dlcr,

Did you try shooting your handi with no "O" ring? there are other methoods of free floating as well. I am going to glass bed my handi rifles in January.

John

dlcr · « **Reply #3 on:** December 13, 2005, 07:40:54 AM »

yes there is play when I take the forend off and shake the barrel from side to side.I tried a piece of coke can on the hinge pin but then I couldn't get the gun to lock up.I'll have to find a .001 or .002 piece of shim stock.

dlcr · « **Reply #4 on:** December 13, 2005, 07:58:08 AM »

In reply to MAC11700'S questions.I fire lapped the barrel because it fouled terribly,also it is my belief that a smoother bore contributes to better accuracy,and accuracy did improve considerably after fire lapping.Also the lapping took place after the molly coated bullets were fired and was done with a clean barrel ,that is all fouling,moly included ,was gone.Second ,I should have explained myself better about the brass.It had been fired a sufficient number of times to fail and the warning signs were there I just didn't pay attention.Also I am not G. David Tubb but I have done quite a bit of shooting and have printed some very small groups with rifles that are known shooters so I really don't think it's my shooting that is the problem,I'm pretty convinced that it's the rifle.There is play in the action with the forearm off so I'll see if I can tighten that up and try it again.I would like to solve this problem eventually ,but I am having fun trying to make this one shoot, thanks for your advice.

quickdtoo · « **Reply #5 on:** December 13, 2005, 09:28:58 AM »

I think you still have the option of sending the rifle back to H&R for repair, the barrel shouldn't be loose on the frame, contact them and ask for it to be returned, if it's new ask that they cover the shipping either by issuing a call tag or by reimbursing you the cost.

As far as fire lapping a Handi, with the shallow rifling, it may do more harm than good. To quote Fred...

Quote

A good cut rifled barrel does not need fire lapping with course grit. With the shallow grooves in the Handy, course grit lapping will just about ruin the barrel.

I always fire lap a new barrel but only with super fine grit 5 shots with 800 and 10 shots with 1200 grit. Which amounts to the same thing as flitzing.
But it is easier on my elbows. Even this system needs to be done with a great deal of care and with low velocity bullets in selected weights and ogives.
_________________
Fred M.

http://www.graybeardoutdoors.com/phpbb2/viewtopic.php?t=77924&highlight=tubbs

dlcr · « **Reply #6 on:** December 13, 2005, 11:34:51 AM »

MAC11700 NO OFFENSE TAKEN YOUR INPUT AND QUESTIONS ARE VERY APPRECIATED , THANKS