Yet Another M1S Upper Report

[interceptor]

Sounds like they are not plugginug the chamber and bore when parkerizing. Shoddy.

[Flewis]

The gunsmith I left mine with is a good one. I asked him to go over it in detail to see what the problem was. I'll let everyone know what I find out.

[hugginsvilleH&A]

this sucks, I just got a M1S hope it goes better than that, do these barrels have a break-in period? is there anyone getting any good results from their M1S, give me a little hope there has got to be some good results somewhere???

[Pitt300]

http://www.quarterbore.net/forums/ph...to=384&cat=562 125g Nos BT

http://www.quarterbore.net/forums/ph...to=452&cat=562 220g SMK

Sorry you all are having so much trouble.
Mine shoots great after tweaking loads.
Above is sample & I'm getting 1/2" w/subs.
See my photo album w/data on images.
I almost always fire lap my barrels w/LBT soft lead slugs & his lapping compound.
Did it to my M1S. Doubt that it made a huge difference but I do believe it helps almost every barrel I do it to.

[hugginsvilleH&A]

so Pitt how did you go about fire lapping your barrel? was there any other little tricks you may have done? surely these M1S cant all be bad, what are the odds,,,,

I was wondering if the problems were not charge related, half a grain can sometimes throw things way off, had that happen with a LM the charging chain link kept going up/down a link every other pull and was getting crazy results from 2 different guns,very frustrating till I figured out what was happening , fix it and has been smooth sailing every since.

[Pitt300]

My 1st question is how good is your shooting w/a KNOWN accurate rifle?
How good are your scope/rings & mount/rest & shooting technique?
How's your trigger?
Hand guards free floated?

Start shooting w/the 125g Nos BT's @ supersonic.
These tend to shoot good in everyones guns & this will let you see accuracy potential.
Subsonic is next after your SURE the gun is 100%.
Subsonics can be frustrating & you need a chronograph to confirm your loads & remember they can be/are temperature sensative.

There are a LOT of things that will effect accuracy BEFORE you ever pull the trigger.

This is Wheeler's kit from Midway BUT I like LBT's below.

http://www.midwayusa.com/midwayusa/S...it%20Instr.pdf

http://www.midwayusa.com/eproductpag...612&t=11082005



LBT is at : http://www.lbtmoulds.com/index.shtml

You'll need his LAP kit & 20-40 of HIS .308 SOFT LEAD bullets.

I load about 10-15 of them subsonic which should be easy for our group.
Dip the tip of the loaded cartridge in the lap compound just like dipping an ice cream cone in a pot of hot chocolate syrup.
Carefully load directly into chamber.
Shoot so that you KNOW it has left barrel-fire thru chrono/into pond @ steep angle so no ricochet/into target or dirt berm where you can see impact.
Do about 10 w/compound & then shoot 3-5 w/o just to "wipe" out the barrel.
Then clean the HELL out of it.
Now see how it does.
May need to do again.
He recommends covering the bullets w/compound/rolling between 2 steel plates to totally get it in all of the gas check rings/put this wet bullet in your reloading press over your primed & charged case/seat it/wipe compound off outside of case & Then clean up the dies.
My technique is how he tells you to do .22 soft lead bullets.
I'll probably start a shit storm w/this but I've had very good luck w/his products & my technique.
Try it if you like!
Don't if your not interested.
Works for me & I think my groups show that it did not hurt the barrel.

[kurtz]

Originally Posted by Pitt300

I'll probably start a shit storm w/this but I've had very good luck w/his products & my technique.
Try it if you like!
Don't if your not interested.
Works for me & I think my groups show that it did not hurt the barrel.

Pitt, the lapping looks like it may do the trick....I'm game to try it....

I ran a slug down the barrel today and found that the Model 1 bore was pretty tight....the slug checked at .306 and .301 (also confirmed the .301 bore with a reamer pilot)....my tightest .308 that I know that shoots good is a Palma and checks at .3075 and .298....my others go out to as much as .3085...

I remember about 15 years ago that a rifle manufacturer had to make changes to their production line because their barrels were about .002" too tight and causing out of the box accuracy problems....they made a change to free up the bore a little and the accuracy came back around....

Pitt, thanks for the info...

kurtz

[Flewis]

Originally Posted by kurtz

I remember about 15 years ago that a rifle manufacturer had to make changes to their production line because their barrels were about .002" too tight and causing out of the box accuracy problems....they made a change to free up the bore a little and the accuracy came back around....

kurtz

I have noticed more than the usual amount of copper jacket material in my bolt when I am cleaning the rifle... makes me think this might be my problem.

This may be a stupid question, but if a bore is too tight, can it be re-rifled for that small amount or is it scrap?

[ranger dave]

the best all around load i have worked up is 8g of 2400 with a 147g win fmj the bullets are about half the price of a match king . id go broke feeding my whispers mk every time i shoot

[kurtz]

Originally Posted by Flewis

I have noticed more than the usual amount of copper jacket material in my bolt when I am cleaning the rifle... makes me think this might be my problem.

This may be a stupid question, but if a bore is too tight, can it be re-rifled for that small amount or is it scrap?

I single shot fired a few of the Hawk bullets out of my Model 1....the Hawks mic a little under .309.....after firing and running a chamber brush in I pulled out a perfect ring of copper jacket....looked like a little hoop ear ring....

I have never had to lap a barrel before, most of the ones I have cleaned up through normal break in/shooting, but I'm willing to try it as tight as the bore is on this one....should be able to free it up the .0015 or so and smooth out the tool marks....I don't think it would be necessary to re-rifle it for that amount, and I think getting a button to match up with the current cuts might be a little tough....

I probably won't be able to mess with mine for a week or so but I'm going to give the lap a try....