No wads today...................
Nov 25, 2014 20:13:25 GMT -5
Post by Richard on Nov 25, 2014 20:13:25 GMT -5
Last week I was impressed with how good the TMZ's shot both with three different wads and also with NO wad 
My intention today was to try a 8/60 Clays/H-4198 duplex with the TMZ's to see if 8 gr. of Clays was enough to give me good accuracy...........but, I got way/laid with another comparison.
The weather was 52*, cloudy with not a hint of wind.........Perfect for shooting and chronographing. My .45 Rem/PAC had a squeaky clean barrel which needed fouling. I usually try to use up bullets that are collecting dust in my "Stanley" bullet box along with extra loads I have on hand. So today the 300 gr. Hornady XTP Mags got the nod along with 5/60 Clays/H-4198. I had serious doubts the first shot was going to fire as the bullet went down quite loose. When I pulled the trigger, fire belched out the muzzle with a deep sounding "boom" and the chronograph red 719 fps
.........So I loaded up another with the same charge and it went up to 2498 fps as I expected. Figuring the third shot would still come up a little more, I decided to try loading the XTP Mag. with NO wad. To my surprise, the velocity dropped 100 fps to 2392 fps. Seeing as how all my shots last week with and without wads all stayed in the same ball park, I surmised that it (the lower velocity) was due to 5 gr. of Clays rather than the 10 I had used last week. So this led me to my first group which was the 10/60 duplex with the 300 XTP Mag and no wad. The velocities immediately came up to where I was last week and the Extreme Spread was 13 fps! (It is also interesting to note that my third shot was a bullet so loose that when I inserted it in the muzzle, it dropped a couple of inches and a straw could have pushed down the barrel - I think it might have been a bullet I used in the past to test bore tightness?) (Yet, it went off with very similar velocity as the others!) This is type of ES's I get with my CF match loads! Now the group was not a bug hole but it sure was nice and tight and round! Seeing as how it shot so good at 100 yards and I only had three of these bullets left, I went to my 300 yard target. When I shoot these heavy bullets at 100 yards I use the first mil dot for zero (the lighter weight bullets get shot with the cross hairs) So at 300 I thought I would use the second mil dot and see POI. I kind of figured and it went some 12" low of my POA but gave me a very nice 2.2" group and a 9 fps ES
For the last group I stayed with the 10/60 duplex and shot three Barnes 290 TEZ's (no wads). Using the same POA and the same "2nd. mil dot", my POI was only 4" low with a 3.2" group! (higher BC and 10 gr. lighter bullet)
Based on the above testing, I am convinced that it is the Clays/(or Red Dot) that account for the good ignition and obturation of loose fitting bullets. I will be shooting more bullets in the future with no wads. It will be interesting if lighter weight bullets will need more booster to work effectively with no wad.
Richard
My intention today was to try a 8/60 Clays/H-4198 duplex with the TMZ's to see if 8 gr. of Clays was enough to give me good accuracy...........but, I got way/laid with another comparison.
The weather was 52*, cloudy with not a hint of wind.........Perfect for shooting and chronographing. My .45 Rem/PAC had a squeaky clean barrel which needed fouling. I usually try to use up bullets that are collecting dust in my "Stanley" bullet box along with extra loads I have on hand. So today the 300 gr. Hornady XTP Mags got the nod along with 5/60 Clays/H-4198. I had serious doubts the first shot was going to fire as the bullet went down quite loose. When I pulled the trigger, fire belched out the muzzle with a deep sounding "boom" and the chronograph red 719 fps
.........So I loaded up another with the same charge and it went up to 2498 fps as I expected. Figuring the third shot would still come up a little more, I decided to try loading the XTP Mag. with NO wad. To my surprise, the velocity dropped 100 fps to 2392 fps. Seeing as how all my shots last week with and without wads all stayed in the same ball park, I surmised that it (the lower velocity) was due to 5 gr. of Clays rather than the 10 I had used last week. So this led me to my first group which was the 10/60 duplex with the 300 XTP Mag and no wad. The velocities immediately came up to where I was last week and the Extreme Spread was 13 fps! (It is also interesting to note that my third shot was a bullet so loose that when I inserted it in the muzzle, it dropped a couple of inches and a straw could have pushed down the barrel - I think it might have been a bullet I used in the past to test bore tightness?) (Yet, it went off with very similar velocity as the others!) This is type of ES's I get with my CF match loads! Now the group was not a bug hole but it sure was nice and tight and round! Seeing as how it shot so good at 100 yards and I only had three of these bullets left, I went to my 300 yard target. When I shoot these heavy bullets at 100 yards I use the first mil dot for zero (the lighter weight bullets get shot with the cross hairs) So at 300 I thought I would use the second mil dot and see POI. I kind of figured and it went some 12" low of my POA but gave me a very nice 2.2" group and a 9 fps ES For the last group I stayed with the 10/60 duplex and shot three Barnes 290 TEZ's (no wads). Using the same POA and the same "2nd. mil dot", my POI was only 4" low with a 3.2" group! (higher BC and 10 gr. lighter bullet)
Based on the above testing, I am convinced that it is the Clays/(or Red Dot) that account for the good ignition and obturation of loose fitting bullets. I will be shooting more bullets in the future with no wads. It will be interesting if lighter weight bullets will need more booster to work effectively with no wad.
Richard
