First time Savage Build, questions and progress

[charlie b]

Congratulations! Sounds like you have a good one (or two, gun and wife :) ).

[Fuj']

I've been following.....

[Rocketvapor]

Loading up some more ammo for a practice session maybe tomorrow or Thursday.
Got some more Win41 primers and will let her try the 41's (20ea) and CCI450 (20ea) plus some foulers.
Didn't do a deep clean on the barrel.
Played with the springs and got a 7oz pull with about 50% blade force.
Original Trigger and Sear.
10 pull average is 7.2oz, range was 7.4 to 6.8

[Rocketvapor]

Wife shot a few of the WIN41 primers with the modified old style pin.
Just 10 of the WIN41 and 10 CCI450.
Still haven't done the set screw mod but it can only make things better. Right?
Ignition was fine with the 41s but she quit early, not feeling up to par.
She helped record a primer weight test I was doing with my AR.

The pin was the flatwound spring (sort of light), two 0.050" shims in the spring stack, a 38/ceramic ball with a 1/4" ball (larger contact radius) and about 0.095" added to the internal stack. Used a new style BAS with a micrometer carbide tip inside. No external shim. I counterbored the cocking pin threads about 1.5 threads to get the pin threaded in a little more and shorten the spring length. Will post pictures when I pull the bolt back apart. She likes the lighter trigger.

I cut between 1.5 and 2 turns off the Target Trigger Safety Blade spring and used the Target Trigger trigger spring (but used the original trigger/sear). Have not installed the Target Trigger/Sear yet.

I like the new digital trigger gauge. Seems accurate and repeatable. Measurement of blade force for LOW trigger weights might have a safety benefit.
It LOOKS like some blade force is applied directly to the trigger. I ended up with about 7 oz of total force including 3.5oz safety blade force.
That's about 50% and assumed a safe ratio.

Pictures later.
and the Tubbs springs (2) are on order.

[Rocketvapor]

Here's what happened last Thursday.
I loaded up a primer weight to muzzle velocity test for my AR with heavy CCI primers and light primers.
But, not going to talk about that here :)

Flo shot 10 rounds with CCI450 primers and 10 rounds with WIN41 primers.
Shortly after we started we got a Sensor message on the shotmarker and rounds drifted right about 3/4 to 1moa.
Velocities were about 50 to 100 fps less than expected in spite of muzzle velocities normal to a little higher.
Everyone I've talked to said one sensor shouldn't cause that.

Here's 10 shot groups from my AR on two different days, extreme heavy and light primers.
My intent was Velocity Vs Primer weight. Odd# was light primers one day and reversed to odd# shots were heavy primers on the second day.



So on to Flo's results, shot 4 foulers then a ten shot group.
Her group shifted RIGHT and ShotMarker velocities were also lower.
Even with that she got a pretty good group with CCI Primers (all about 3.66grains).

Her Garmin data for the ten shots were:
Flo 3/21/24 Savage 22N
CCI 450 3.66gr 31.8gr SB6.5 85.5
10 shots
min 3002.3
avg 3018.2
max 3033.1
ES 30.9
SD 11.2
3000fps at the muzzle usually gets about 2000fps @ 600.
Did I mention she REALLY likes the trigger @ 7oz :)
We go back this Thursday to practice some more.

[Rocketvapor]

Here's the progress on her firing pin (STILL HAVEN'T made it to town for the 1/4X28 set screw )

Info gathered mostly from old posts by Fred and Dave.

Pin protrusion is about 0.035-0.036", compared to new pin @ 0.058".
Drilled into the bottom of the cocking piece about 1.5 to 2 threads to shorten pin length about 0.045" (increase fall).

Used the Colt Commander flat wound spring Dave found. Force was a little low so I used 2 races from a Chinese 10mmX5mmX4mm thrust bearing, got 10 for about $8. Had to ream out the 5mm ID with a carbide spiral bit to fit over pin shaft. 11X5mmX4.5mm (5mm reamed to 6MM) would probably fit down at that end of the pin.
Could use one each 10mm and 11mm, or two 11mm for a small range in mass and spring force.

Used new BAS and a 10mm carbide micrometer tip and another 10X5mm race. One wrap of 0.002" Kapton tape trimmed to carbide tip. Tip ended up recessed about 0.030" after the addition of the 10X5mm race.

38cal case head bored for a 1/4" Ceramic ball, snapped in with vice adds about 0.127" to internal length or 0.097" including BAS recess (0.127" - 0.030"= 0.097).
Could eliminate race inside BAS for about 0.080" recess, 0.127"- 0.080" = 0.047" total inside increase.
No external shim.
Will continue to monitor performance but worked with 41 type primers.
This is NOT a Thrust Bearing "KIT". It is a Chinese thrust bearing (eBay), used for the races only.

[Rocketvapor]

Made a range trip to Saorsa Acres in Bogalusa.
600yds, windy as heck, then some 100yd shots.
Flo dialed back to her previous 100yd zero and shot at an 8" target ,push pin in center as a POA (bad idea ).
Shot the 4 sighters then 10 shots with CCI 450 primers, then changed target and shot 10 with WIN41.