Mouse Fart Musing for .308W and 30 Govt?

[John Boy]

Every time I read ‘mouse fart’ in a post, I have wondered for measurements ... has anyone ever measured the velocity of the fart and the decibel reading of noise they want to achieve ..

[Krag 1901]

I haven't Chrony'd them but will, I didn't notice much less noise from them but will pay more attention as I try to reduce the loads to subsonic. They weren't as loud as Hi Vel .22s though.

[Cosmic_Charlie]

17 grains of 2400 and about 1700 fps are my light loads for .308. Reloading a bottle neck case seems like too much work for so little effect.

[Beaverhunter2]

17 grains of 2400 and about 1700 fps are my light loads for .308. Reloading a bottle neck case seems like too much work for so little effect.

???

No more work than straight-walled unless you're talking about a little lube and a trip through the tumbler to clean it off. Not a ton of effort IMO.

[Krag 1901]

Try upping the charge to 20 gr and see if you can get 2000 fps with a 155-160-170 gr boolet. I've done it and it worked even more accurately! A slower powder works too.

[racepres]

the round ball 311 or 312 (I dont recall) at 73 grains are duplicates of 22RF at 1200 fps with 3.0 gr of Red Dot..

I can get the FPS of the 130's if Interested

[Krag 1901]

At long last I got word today that my 120 gr 32-20 boolets have shipped and should be here Monday! I have 50 rnds prepped for them and will load the first trials with 700X and Unique. These will come sized for .312 and I'll try some there and some resized to .311".

These are BB and coated with Hi-Tek so that will be interesting, too.

[Krag 1901]

Well the 32-20 boolets showed up today. They look really cool with thier gold Hy-Teck coating but they seem to be sized .315" at the base. It's too hot today to try resizing them, I'll have to wait until later tonight to get to the bench.

They are supposed to be 13-15 BHN so hopefully they will size w/o over stressing my little RCBS Jr press.
////
19:00 hrs I went down to size a few of the 32-20s and they sized alright in the .311 die. It was stil too hot to spend much time but at least I found out they did Okay.

21:00 Hrs cool enough to try to size a hundred or so and maybe in the morning load some Pharts.

[Goofy]

[725]

Goofy - Very nice. Will try same with the 311041. What's the RB data?

[Krag 1901]

I finished resizing a couple of hundred 32-20s (2-3 lbs) today to .311" and will load up some .308's this evening after it cools down. The boolets look good and seem to be well cast. I'm going to just use my lil' Dandy to drop the 700x charges and Chrony them on Tuesday. I want to see how 7-9 gr's 700x will work with low effort loading.

I will weigh and dribble the first 20 or so to get a base line for ES and Velocities. but will just double clang and drop the last 30 or so. I was thinking on using them in .308 but may use them in the Krag to see if these short boolets will work in the long throat. No use taking three rifles to the range as I'm using the .223 & Krag for Scope setup and the .308 might shorten the cases with low pressure loads. Humm???
Goofy: WHat is that short round? It looks like a shortened .30-40 X1.5"?

[Goofy]

Goofy - Very nice. Will try same with the 311041. What's the RB data?

CCI 500 primers, 20 yards, Hornady .310" round balls w/light smear of SPG lube

1.5 gr Bullseye, Avg 719 fps .79" for 5 shots
1.8 gr Bullseye, Avg 881 fps .73" for 5 shots
1.5 gr Red Dot, Avg 873 fps 1.45" for 5 shots
1.5 gr 700X, Avg 913 fps .82" for 5 shots

[Krag 1901]

Early this morning I loaded 50 rnds of .30-40 with 7.6-8.6 & 9.6 gr of 700x and the 120 gr Gold boolets. I going to take them out in the morning and shoot them to see how high/low the velocity is, and accuracy too. I'm expecting to see ~1,400 fps, so not exactly subsonics. I loaded them long as I could, just putting the lower drive band (approx .300" seating in the case) in the case and tried to get the same leadup to the lands as my 160 gr Lees.

I've got to sight in the 2x scout scope first, so I'm using the 312-1602Rs and 25 gr IMR-4198 as the sighters and then see where the 120's will land?

[725]

Thanks

[Krag 1901]

Just checked the weather forecast and it's supposed to be 78 degrees by noon, wind 6-10 mph SSE. High of 82 by 4 o'clock. I need to load up the car and get to the range early to set up the Chrony and stuff. This is only the second time for me shooting in ~five years.

I limited myself to 150 rounds of .223 and .30 Govt. so as not to get a sore shoulder.

[MT Gianni]

If by mouse fart you mean quiet, you want the heaviest bullet possible with a light powder charge. If you mean light lead charges to use less lead that is just a light load, may or may not be quiet.

[Krag 1901]

Well, mixed results today at the range. Good news the 32-20 boolets shot pretty well at 50 yds, looks like 8.6 gr 700x was a good load, not subsonic but light and good for trigger control practice. I was able to check the 7.6 gr load on the Crony, but Bad News, it stopped working when I switched it off and back on. I thought the battery was gone so changed it, but still no joy! Avg 1422 fps 18 SD.

My trigger control is getting better and if I concentrated on a smooth let off, got some good groups with the 120's and 8.6 gr load.

I got the 2x scout scope set up and ~zeroed at 50 yards. I got the Ruger scope leveled and zeroed at 50 so that was good too.

I only shot about 50 rounds and found a couple of brass problems. The Krag had a problem with primary extraction on some of the 160 gr Lee and 25 gr 4198 loads. Like the necks were sticking in the chamber. I had to whack the bolt handle pretty hard to get the case to extract.??? Once I got the cases out, they rechambered fine and extracted easy? I've just been neck sizing them and may have to do a FL resize next load cycle. Like the powder residue on the necks was sticking in the chamber. I'll clean the chamber well this evening to see if that helps.

The .223 had a problem in chambering some rounds and it looked like the cases need FL resizing, The base of the necks seemed to be a bit long. That brass lot had been fired a bunch of times and mostly neck sized. I shot this same lot of brass last week and did not have this problem, but the load was -1gr under max and it is Mil LC brass so that may be a factor?

Still not a bad day at the range. Have lots of ammo left to check Velo's if I can get the Crony working again. I'll use my springer pellet gun to check it and see if all the connections are good, This week.

[Goofy]

Thanks

To be clear, the round ball loads and 311041 targets were shot with a wildcat I call the .30 Sneezer. It's a .357 case necked to .30 caliber and has approximately the same case volume as a .30 Carbine.

I do shoot the 311041 in a .30-30 as well, but with a bit more powder as you might imagine. Target below reflects a minor amount of load work at the 50 yard line.





The combo shoots reasonably well in the 1,200=1,400 fps range and is a pleasure to plink with.

[Krag 1901]

Last night I cleaned up the Krag and found NO leading from the other day. Bore was smooth and no streaks at all.
The 120 gr boolets shot like a .22 short and I could feel the trigger let off with out the recoil interfering at all. Made me smile.

I'm going to try reloading 10 of the spent 7.6 gr shells with about 5.0 gr of 700x to see how much lower velocity will be. The 120's shot about 3" lower at 50 than the "Full power" 160 gr loads.

Hopefully I can get the Chrony working again. I'm too cheap (broke) to buy a new one.

[Krag 1901]

I Had 20 rnds expended so I loaded 120's,10 ea with 4.0 gn and 10 ea with 5.0gn 700x exactly, to see if I can get sub sonic.

I'll work on the Chrony this weekend to see if I can get it working.