CG-63 CG63 Swedish Mauser vs K31

[vor503sm]

Working on a load for my newly acquired CG-63 Swedish Mauser (receiver 1909)

Only bullets locally at bass pro was 6.5mm Nosler BT Hunting 100G. My first attempt using used Norma brass which looks to have only been neck sized only.

Bullet: Nosler BT hunting 6.5mm 100g.
Powder: H4350 44g
OAL: 3.05"
Primer: Winchester Large Rifle (WLR)

Range: 100 yards
Target: 25 Yard Timed and Rapid Fire Pistol Target
Front sight aperture set for 300m target (lots of space between front sight diameter and target black).
Shots: 15 (2 were sighters).
Spread: 2.65" from C-C

Cranked the rear GF rear sight all the way down and was still high at 100 yards (~4" high) and a little to the left (attached picture of receiver slot required for GF rear sight). Hope is that it will drop down at 200 yards. Two stage trigger that feels like 5-6 lb. Action is bedded so not thinking about replacing the trigger at this time.

[Enfield47]

Looks like you're getting there with your load development. Do you have an opportunity to see how it does at 200 or 300 yards?

[Discogodfather]

That looks good to start but I think you could do alot better with a CG-63 if the barrel wasn't too badly shot out.

I'd look into some berger hybrids or Amax's or Sierra BTHP, they do wonders in my AG-42b and 41b. The hunting bullets just never work for me. Also, 100 grains? What is the twist rate on a CG-63?

I was getting some fantastic results with 140 grains. 1.5" 5 shots off the AG-42b and sub moa on the M41b.

[vor503sm]

CG-63

The plan is to shoot a few high power matches locally this year once I get a decent load. I think with a 200 yard targets the front aperture and target black should match up better. The barrel looks VG, but we will see! Planning on trying Sierra 100g varmite, Sierra 120/140g SMK. Would love to try the Berger but really expensive. Something different to shoot then the ar at the HP matches.

S

[vor503sm]

CG-63 Swedish Mauser [200yard HP Match]

First High Power match this weekend (200 yard reduced course) with the CG-63. Had a few issues with the match (also not the best shooter).
1. Stripper clips did not work great: Could only load 3 with the stripper then manually load two. Need to purchase Swedish Mauser clips.
2. The 100g Nosler BT did not drop down as I hoped, 100 yard and 200 yard both high (very flat shooting round) same distance from center. Had to hold off with not much luck. Will order SMK 140g, hopefully this will drop the rounds down.
3. Front aperture still way too large. Came with 3.8mm ID, ordering 2.4/2.6/2.8mm apertures. I know that I use 2.8mm for my h&R model 12. Thinking 2.4mm will work
4. Some rounds did not chamber, not sure why, will have to investigate.

Even with all the issues it was fun! Have not shot a bolt gun in a HP match in 100 years. Almost as old as the receiver (1909). Positive is the front sight is so far out there I did not need my glasses to focus on the front sight. The score did not reflect the potential (426), just glad to get the shots off in rapid stages. Looks like I am dragging wood at slow prone!

[Discogodfather]

Nice, highly recommend the 140's they seem to give better results at long range and at 100.

Where are you getting the apertures from?

[vor503sm]

CG-63 Swedish Mauser

Purchased Elit inserts on E-Bay.

24-15 (2.4mm)
26-16 (2.6mm)
28-17 (2.8mm)

Steven

[vor503sm]

CG-63 Swedish Mauser [Shell Holder Size]

Update on shell holder size and cases not chambering.

1. Attached picture. RCBS # 3 fits for the two NORMA headstamp cases on the left. RCBS #2 fit all NORMA headstamp cases pictured.

2. For the cases not chambering I did not push the shoulder enough when sizing. Purchased used Norma cases that were already sized. First try I just loaded the cases as purchased. The shoulder length about the fired formed dimension (1.754"). So some chambered and some did not (right on the edge). Got a little smarter and resized the remaining norma cases and pushed the should way back (1.750") no issues chambering. I knew that I should always size my cases new or used at all times to ensure proper chambering, sr. moment.

Fired case: Case base to shoulder datum= 1.754"
Sized case: Case base to should datum= 1.750" (chambers great).

[Discogodfather]

Update on shell holder size and cases not chambering.

1. Attached picture. RCBS # 3 fits for the two NORMA headstamp cases on the left. RCBS #2 fit all NORMA headstamp cases pictured.

2. For the cases not chambering I did not push the shoulder enough when sizing.
Fired case: Case base to shoulder datum= 1.754"
Sized case: Case base to should datum= 1.750" (chambers great).

Why did the head-space vary? Was it different brass?

[smithrjd]

The Swedish Mauser 6.5X55 was designed to shoot long heavy bullets, 156g round nose. It will have a long throat. I bet it will do better accuracy wise with bullets 140g and up. The 6.5X55 case has two dimensions, US made brass will be the standard .473 (like the 308 30-06) European brass (Norma Lapua etc) will have a .480 case head. That is why the standard 30-06 shell holder does not always work.

[vor503sm]

CG-63 Swedish Mauser [Elit Front Insert]

Picture of old and new Elit front sight insert (bottom tab different shape). New Old Stock (NOS post and aperture style) still available from Sweden (Bo F.). Great guy that has lots of Swedish Mauser stuff.

Steven

[MajorSideburns]

Like other people said, I think you should try some heavier bullets. These rifles were designed for bullets in the 130-160gr range, that will also bring your groups down to match your sight settings

[vor503sm]

CG-63 Swedish Mauser [Bullet Seating Depth]

Just received a package from Midway! Feels about 70,000 gr. (140gr x 500).

Bullet seating depth (to lands): Norma sized case using Stoney Point Gauge.

OAL:
Sierra 6.5mm 140gr SMK= 3.21"
Nosler 6.5mm 100gr BT= 3.24

Basically no chance of seating the bullet to the lands! Will try max OAL of 3.062" and reduce the length until optimized load density (don't like to compress the powder). No time this weekend, have the BARC 2018 match! HK91 HM Tactical Division.

Steven

[vor503sm]

CG-63 Swedish Mauser [Norma Primer Pocket]

For the number of Norma cases where the primer pocket was to large using Winchester WLR primer (purchased used norma cases) I was able to salvage a few by using CCI primers. I use a cheap Lee auto-primer with a little compression after contact. Based on my measurements with a dial indicator (accuracy 0.001" maybe) the Winchester WLR used were the smallest diameter that I have. The CCI were the larger diameter that I have. Note I will have to find my mic to get better measurements. Will update picture when I can find the mic..

Steven

[vor503sm]

CG-63 Swedish Mauser- Range report

Took the rifle to the range to test out 4 types of powders for accuracy (100y).

The powders used and results (5 shot group, 100 yards, rest). Started with a clean barrel (no fouling shots).

1. H4350 (40gr.)= 2.42"
2. Varget (33 gr.)= 2.74"
3. IMR4064 (35gr.)= 1.67"
4. H4895 (33gr.)= 1.55"


Maybe should have fouled the barrel before starting the check. Looks like the rifle likes H4895 a little better. Next step is to dial in H4895 and see if I can get H4350 to work better (purchased this powder just for the CG-63). Have 60 rounds loaded up with H4350 (40gr.) and I don't think the shots will drop enough for the 200 yard match next month. May use the post front sight and use a 6 o'clock hold to get the rounds to drop.

Steven