Project #2 - 30 Carbine Blackhawk...

Huey
[subject]
Tuesday, May 07, 2019, 12:08 (2673 days ago)

This gun and the 10mm-40 Blackhawk posted below have drug on too long. I vowed to get them both going this week.

This gun received the same action work, springs and base pin as the 10mm-40. Barrel gap on the 10mm-40 was .004" and the 30 Carbine came in at .0035". Prefer tighter, but happy with this on factory guns.

Throats were .309" so bullets were sized the same. Bore slugged .3082" or as close as I could measure.

The cylinder was generously long, so the 115 grn GT Hollow Points were seated to a COAL of 1.742". Powder used was Unique as is generally what I start with using cast bullets.

I loaded and fired 12 rounds at 25 yards. 11 of the bullets made one ragged hole under 1". You can bet the single flyer was my poor marksmanship.

[image]
[image]
[image]

You need a 321 GNR cylinder for that

Amede
[subject]
Tuesday, May 07, 2019, 12:17 (2673 days ago) @ Huey

- No text -

That's highly likely...

Huey
[subject]
Tuesday, May 07, 2019, 12:23 (2673 days ago) @ Amede

- No text -

30 carbine

Frank B
[subject]
Tuesday, May 07, 2019, 12:30 (2673 days ago) @ Amede

Love mine, use 32/20 brass instead of carbine brass.

Very similar cartridges. I'll be sizing 32-20 bullets down..

Huey
[subject]
Tuesday, May 07, 2019, 13:26 (2673 days ago) @ Frank B

Because I can match them to the throats. Will probably try some .309" coated bullets too. May need Gary to D&T Topstrap when I add the 321 GNR Cylinder.

Poor marksmanship my a**

Sid R
[subject]
Tuesday, May 07, 2019, 12:46 (2673 days ago) @ Huey

That was fantastic. I almost got away with one of those for 300 bucks last year. Fella had a change of heart and I had a broken heart.

This is from a bench and the gun definitely better than me..

Huey
[subject]
Tuesday, May 07, 2019, 12:56 (2673 days ago) @ Sid R

It was a rewarding group considering my first effort. I did quit after the group as to not discourage the situation.

I'll size some 100 grn XTP Bullets down to .309" and try them too.

But, the GTs were super accurate and mushroomed to almost 36 Caliber when fired into dirt.

Impressive projectiles.

Sid R
[subject]
Tuesday, May 07, 2019, 13:53 (2673 days ago) @ Huey

I have some GT's with gas checks. Flat nose. They are accurate too.

Nice job Huey!

BlackPete
[subject]
Tuesday, May 07, 2019, 13:41 (2673 days ago) @ Huey

- No text -

Ya love it when a plan comes together, nice work.

Howard
[subject]
Tuesday, May 07, 2019, 17:08 (2673 days ago) @ Huey

- No text -

Very nice Huey

Kyle
[subject]
Wednesday, May 08, 2019, 07:18 (2672 days ago) @ Huey

- No text -

Thanks Kyle, I just finished a range session with heavy...

Huey
[subject]
Wednesday, May 08, 2019, 07:54 (2672 days ago) @ Kyle

Bullets. The 125 grn SWC Bullets from Rim Rock sized to .309". I've read these guns usually won't shoot the heavier bullets, but this one shot under 1" again.

I used 1680 Powder because Unique just too fast to get decent velocity. Shot these at just about 1400 fps with loads one grain under maximum.

I believe most of the accuracy comes from properly sizing the bullets.

powered by my little forum