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My incremental improvements - scout squad

This is a discussion on My incremental improvements - scout squad within the Accuracy forums, part of the M14 M1A Forum category; As most of you know, I picked up a lightly used scout squad the other day (manufactured in 2000). I plan on making incremental modifications ...


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Old December 19th, 2016, 06:50 PM   #1
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My incremental improvements - scout squad

As most of you know, I picked up a lightly used scout squad the other day (manufactured in 2000). I plan on making incremental modifications to it in order to squeeze out all the accuracy I can from it with as little investment as possible. I'm not trying to make it a match rifle; mainly just little things that make a positive difference.

For testing purposes, I loaded up 100 rds. of 168 SMK's over 40gr H4895 at 2.8 OAL (+/-.005). M118LR brass and Winchester primers. Ladder testing will be done once I feel I'm approaching the point of diminishing return on $ vs. gain.

I took it out today for the first time to establish a baseline. Once the scope was reasonably close (2.5x Leupold), I fired 6 shots in order to give myself the option of eliminating 1 possible flier. All testing performed at 100 yards off the bench (front resting on sandbag) for now...

6 shots = 3.56 (I knew that I pulled that one in the top/left a bit)
Best of 5 = 2.39



Then, I decided to try out Tubb's Final Finish bore lapping system. For those unfamiliar, this kit includes 40 projos (175gr HPBT) with jackets impregnated with 4 different grits of aluminum oxide, and 10 projos impregnated with boron nitride. 10 bullets with each grit, and you start aggressive and then use finer compounds as you progress. This process is supposed to:

- remove reamer marks in the throat from chambering
- increase dimensional uniformity (knocking off the high spots on the lands)
- smooth-out tooling marks
- increase surface finish

It sounded a bit gimmicky at first (and if it came from anyone else I'd consider it snake oil...), but I've read a few testimonials that swear by it. You load these like you would anything else, except stay around 2200 FPS (a little over most starting loads, but nowhere near max loads).

https://www.midwayusa.com/product/51...iber-and-762mm

G. D. Tubb talking about it here:

Accidentally, I didn't follow the instructions to the letter. You're supposed to start with a clean barrel (which I did), but you're supposed to clean the bore after every 5 rounds. But, I cleaned after every 10 rounds (after each compound). I believe this system was made primarily for those barrels that just don't shoot well, but overall, I feel it was worth the money for my rifle.

Overall, I'm impressed. I was actually expecting a bit worse on the first string. I wish I had a lead sled to eliminate as much human error as possible. Maybe I got lucky, maybe the wind Gods smiled upon me, maybe I held harder on the second string, etc., etc...you be the judge. I'm no world-class rifleman (far from it...), but I'm no slouch either.

Second 6-round string after the 50rd. Tubb system and cleaning:

6 shots = 2.02
Best of 5 = 1.92



I'm not sure which trick I'll work on next; maybe I'll go over the stock and contact/pressure points. For the time being, I picked up 1K pcs. of LC brass today for a smokin' deal!

-WRM


Last edited by WRMorrison; December 20th, 2016 at 05:43 AM.
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Old December 19th, 2016, 07:29 PM   #2
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Lapping barrels used to be common practice when America competed with single shots. I personally see only upsides to this and not real down sides. I have used them to fire lap a constriction on a #1 Ruger where the barrel band attached.
Like you said, incremental progress.

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Old December 19th, 2016, 07:34 PM   #3
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Did you have to do any more sanding on the wood hand guard, or did it clear?

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Old December 19th, 2016, 07:51 PM   #4
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Originally Posted by Wasted ammo View Post
Did you have to do any more sanding on the wood hand guard, or did it clear?
I haven't touched it yet; actually, I haven't even done a detail strip on it yet, so it hasn't been out of the stock. That's next on my list. Just looking at it though, it looks like the handguard touches the full length of the stock.

-WRM

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Old December 19th, 2016, 07:56 PM   #5
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Keep me up to date with pics and what you do to improve. I'm learning this also.

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Old December 20th, 2016, 05:08 AM   #6
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Good luck with this project and keep the forum updated

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Old December 20th, 2016, 05:11 AM   #7
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Originally Posted by Wasted ammo View Post
Keep me up to date with pics and what you do to improve. I'm learning this also.
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Good luck with this project and keep the forum updated
Absolutely.

-WRM

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Old December 20th, 2016, 05:39 AM   #8
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Great write-up. I used Tubb's on a brand new Scout, so I didn't have a base line, but mine shoots well, also. Keep it coming.

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Old December 20th, 2016, 05:46 AM   #9
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Slow, steady progression and good write ups like this really helps others to get their rifles up to speed, thank you for this information. Keep up the good work and keep us informed.

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