Post by: CP on April 17, 2009, 07:27:43 AM
50 cal, Knight Bighorn. All charges 100grains of 777, 3 shot averages:
Bullet Sabot Velocity fps
Knight 310 Orange 1875
Sierra 300 Black 1829
Hornady 300 Green 1861
I also found out that a clean bore is worth 150 – 200 fps
Post by: addicted on April 17, 2009, 07:33:17 AM
I also found out that a clean bore is worth 150 – 200 fps
interesting. I wonder if it has an exponentially similar effect on modern rifles.
with how close those speeds are I would think it would come down to prise per bullet and accuracy for your rifle. I need to pick up a chrono to play around with.
Post by: colockumelk on April 19, 2009, 12:26:08 PM
I also found out that a clean bore is worth 150 – 200 fps
This may be true but a clean bore is going to also shoot about 3-6 inches different than a slightly dirty bore will. Personally before I sight my ML in I put one or two round through it to dirty it up. Otherwise you'd have to shoot one round. Clean it perfectly with solvent shoot another round etc. This would take all day. I've found that even if you punch your bore a few times the difference between a clean bore and a punched bore is still 2-3 inches.
Post by: jdb on April 19, 2009, 02:35:57 PM
thats never been the case with either of my blackpowder rifles.I also found out that a clean bore is worth 150 – 200 fps
This may be true but a clean bore is going to also shoot about 3-6 inches different than a slightly dirty bore will. Personally before I sight my ML in I put one or two round through it to dirty it up. Otherwise you'd have to shoot one round. Clean it perfectly with solvent shoot another round etc. This would take all day. I've found that even if you punch your bore a few times the difference between a clean bore and a punched bore is still 2-3 inches.
Post by: stumprat on April 19, 2009, 03:09:21 PM
Post by: fishunt247 on April 21, 2009, 09:23:20 PM
Post by: CP on April 25, 2009, 10:38:16 AM
thats never been the case with either of my blackpowder rifles.I also found out that a clean bore is worth 150 – 200 fps
This may be true but a clean bore is going to also shoot about 3-6 inches different than a slightly dirty bore will. Personally before I sight my ML in I put one or two round through it to dirty it up. Otherwise you'd have to shoot one round. Clean it perfectly with solvent shoot another round etc. This would take all day. I've found that even if you punch your bore a few times the difference between a clean bore and a punched bore is still 2-3 inches.
I don’t find that to be true either. For me, a clean bore = an accurate rifle. But I have found that an oily bore is not accurate when shooting sabots. Sabots must be kept clean and dry to be consistent. If I’ve oiled my bore for storage I will either clean the oil out with alcohol or I’ll fire one shot to burn off the oil, then clean with a moist patch. After that I can get two shots in before accuracy starts to fall off. A quick cleaning with a moist patch after two shots and it’s good to go again.
Post by: jdb on April 25, 2009, 10:13:28 PM