CF understanding the effects of the wind, mirage, bright lighting changing to low lighting to name a few and getting out to learn how to correct for them are indeed extremely important aspects and more times than not the differance in winning or lossing now matter how well ones rifle shoots. It was just not a part of the current subject at hand and if I had to rely on arthmetical science I would be doomed to total and complete failure right out of the starting gate. One has to put the horse in front of the cart prior to trying to attempt to learn the above mentioned and it was the establishing of what it takes to bring up the quality of the horse to its very best abilty that was currently being discussed.   

JLouis

oneatatime wrote on Jan 1^st, 2017 at 11:58pm:

Hmmm?  I never bothered to try between 20 and 30 for BPCR

Calledflyer, with the 20:1 alloy those extra 4 tenths of 4227 caused leading, which I did not get with the harder alloy.

Regards, Joe

Well, Joe, they all have their likes and dislikes, don't they? I have one in .40-82 that is real persnickety, and my .32-40 will digest a wide variety of alloys at widely varying velocities. Like, I said I'd had some of the ones I had upped lose accuracy. I'm sure at some point, it would have leaded too. Unless the alloy, or size of the bullet was changed to adjust. By, the way, is your bullet something that you could size a thou bigger? Might be a good thing to try anyhow. 

I agree with Frank. I just didn't want to question the small powder charge increase after another poster practically said that was what he does more or less as a matter of course when the temps change. All too confusing for me up here in the high altitude.

Thank you for the added info, Joe. I'm suprized that you've got that long of a bullet to stop tipping. I tried to shoot a Ron Long bullet, that was 1.16 long in my 16 twist and couldn't get it to go straight, I fixed that by cutting .050 off the base band and it was competitive with my 15 twist shooting the same 1.16 long bullet (I had a mold for each rifle).

One thing to remmber, regarding button rifling (at least with Douglas barrels) is that they only guarantee the twist to 1/2 inch, meaning 16.5 to 15.5.

Now, for the nose slump guys. There is a guy that is shooting the PB, CBA class, that lives in Seattle and winning most of the matches. I haven't met him but our own SchuetzenMeister (Bob) has shot with him. I asked Bob to varify what alloy he is using to eliminate a typo in his equipment listing in the match results and what he is listing as his alloy is correct.

John Stewart, Miller DeHaas, 32 Miller Short, Krieger 14 twist, 36X Leuplod, PJ 32002 - 213 gr, .3225 base band, 40/1, Lube LBT Soft, 10.8 gr #9, CCI SR

I have never tried 40/1, I've tested 30/1 and used it for a time but after shooting a match that I wasn't happy with, I went back to 20/1.

As many people know, the PJ 32002 is a full spitzer with a 4 caliber ogive, the longest ogive that most shoot.

What do you think about 40/1? I'm going to try it this spring, for sure!

Frank

I believe I shot with John Stewart at the 2006 Nationals. If it is the same fellow he shot to the right of me and a very nice gentleman. When you say John is winning allot of matches what are his scores? Winning is dependent on the competition and the number of individuals shooting the match and by not knowing it could just be a false indicator to the success of the alloy being used. An example would be there a is club posting scores with an average of from two to four shooting the any sight score matches. Some of the scores are quite low and not a true indication of the average scores being shot by other clubs. So one should be aware of who is providing the direction if one wants to achieve National Match success and thus my question. I tried to look it up on the CBA Web site and they seem to have improved it and now I can't find the current scores or those from years past and it used to be quite simple?

JLouis