I loaded up a few hundred 115 grain LRN bullets from Missouri Bullet Co. into 9mm Luger cases with a CCI SP primer and 4.5 grains of Win 231. I shot a couple hundred of them from my Arcus 98DA today.
I recently bought a Chrony F1 and today was the first time I used it. I shot some of these 9mm reloads and these were the readings:
1151
1214
1218
1196
1284
1242
1205
1228
1235
I was surprised to have an average of over 1,200 fps when I was using a load in the middle of the suggested data (4.3 grains start and 4.8 grains max).
I came home and cleaned the pistol. It was leaded pretty bad. I take that back... It didn't look like it was leaded all that bad but it sure was a pain to remove. Took a good half hour to scrub the barrel and I mean I was seriously scrubbing. Probably ran that brush through a couple hundred times. The leading was in the last 1/4 to 1/3 of the muzzle end of the barrel. Close to the chamber was clean as a whistle. I decided to slug the bore. Below is a picture. The bullets are sized to .356". Where the lands dug into the bullet I'm measuring .350". The grooves did not contact the bullet. The picture is a bit misleading because the sides of the slugged bullet don't look to match the un-slugged bullet but that's just because they're sitting in my hand at a slightly different angle.
The bullets are 18 BHN. Should I try loading them at 4.8 grains so the base of the bullet maybe seals better in the grooves? I'm trying to figure out why I'm getting so much leading and need help!
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I recently bought a Chrony F1 and today was the first time I used it. I shot some of these 9mm reloads and these were the readings:
1151
1214
1218
1196
1284
1242
1205
1228
1235
I was surprised to have an average of over 1,200 fps when I was using a load in the middle of the suggested data (4.3 grains start and 4.8 grains max).
I came home and cleaned the pistol. It was leaded pretty bad. I take that back... It didn't look like it was leaded all that bad but it sure was a pain to remove. Took a good half hour to scrub the barrel and I mean I was seriously scrubbing. Probably ran that brush through a couple hundred times. The leading was in the last 1/4 to 1/3 of the muzzle end of the barrel. Close to the chamber was clean as a whistle. I decided to slug the bore. Below is a picture. The bullets are sized to .356". Where the lands dug into the bullet I'm measuring .350". The grooves did not contact the bullet. The picture is a bit misleading because the sides of the slugged bullet don't look to match the un-slugged bullet but that's just because they're sitting in my hand at a slightly different angle.
The bullets are 18 BHN. Should I try loading them at 4.8 grains so the base of the bullet maybe seals better in the grooves? I'm trying to figure out why I'm getting so much leading and need help!
Uploaded with ImageShack.us
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