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Post by jims on Jan 25, 2009 9:57:18 GMT -5
To all you sabotless shooters out there. Some of my bullets take considerable pressure (over 100 pounds) to get down the bore sabotless, even in a clean barrel.
It has helped if I chill the bullets in a cooler first, they then slide down much easier. I then wait until the bullet and barrel can warm up before shooting. I do not cool them so much that the bullets have frost on them to avoid a condensation problem. At least I hope I do not. Ignition has not been a problem.
Does anyone see a problem here. I still plan on getting a reducing die to avoid this but until then or I find the right size die is there something inherently wrong or potential problem causer here?
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Post by sw on Jan 25, 2009 15:33:20 GMT -5
Jim,
When I first started shooting the 40, I found that if I over-knurled(ie very tight) that the accuracy wasn't as good as if I had only moderate pressure to get them down. RB mentioned that he also had poorer accuracy with extremely tight loadings. This could affect your accuracy. ES would be a good indicator as to whether this is causing a problem.
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Post by jims on Jan 25, 2009 15:42:14 GMT -5
;D SW: I am glad you responded. I thought I was getting a chilly reception with this subject. I will keep in mind what you and RB have to say on the sabotless subject. You two seem to have the most/earliest experience in this area.
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Post by ewc on Jan 25, 2009 16:44:46 GMT -5
;DAmen to Steve's post. I have found that it does not take much knurling. I used to knurl too much also-
A couple passes with the file is all I do now.
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Post by Dave W on Jan 25, 2009 17:01:22 GMT -5
My biggest concern would be condensation. The 300SST loads easier in colder temps than what it did in the summer in my gun, but everything loads fairly tight. I too just give a couple passes with the files.
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Post by sw on Jan 25, 2009 18:26:20 GMT -5
My biggest concern would be condensation. While I'm speaking for RB also:), "we" found that if we shot sabotless w/o a wad, it wasn't as accurate. A WW(or likely fiber) should be somewhat of a barrier between the bullet/powder(condensation contamination). |
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Post by chuck41 on Jan 25, 2009 19:43:36 GMT -5
So far I have not found tight loadings a problem with my 40. Just a very light knurling is all that I have found necessary for XTPs and a couple other similar bullets of 185 to 200gr. I also always use either a lubricated wonder wad or a fiber wad.
If I remove the plug, clean the barrel thoroughly and then oil the barrel with a light gun oil a 200gr XTP will very slowly slide down the length of the barrel just under the pressure of gravity. A couple passes over the file makes it big enough to stay put without causing excessive pressure to load at all. Very easy to do. Maybe it is just the "luck of the draw".
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Post by rbinar on Jan 26, 2009 5:38:39 GMT -5
I don't know why I missed this subject when commenting except: some times I do that.
I have always found that the proper loading pressure for sabot-less is about the same as for a firm sabot loading pressure. I don't know why it just works that way.
A tighter bullet is not a problem as safety goes. No matter the seating pressure it won't end up being as much friction a swaging a bullet from the breech end. So as long as the load would be safe from a case it would be safe sabot-less.
Accuracy is another problem. Accuracy depends on a good bullet to barrel fit and if you want to shoot sabot-less you may as well find the method to get that. Nothing less will get you to the point you'd like to be.
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