hwingo
01-05-2010, 08:46 AM
Hi David (and others),
I rarely participate in this part of the forum but on occasions I have a few questions that need answers.
You and I (as well as Reid) have talked on more than just several occasions in the early 80's when you worked at Brownells. I was quite active in the 80's building Bench Rest rifles. I valued your opinion at that time; nothing has changed as you still have my ear.
Regarding "birth" of the PPC and its celebration for accuracy, there seemed to be several attributes of the parent case that significantly contributed to the success of the PPC. For starters, the 220 Russian had a small primer pocket when compared to the AK round. More than several tried using the 7.62 X 39 case when 220 Russian brass began to disappear. The AK parent case didn't do so well. Many were of the opinion that the small primer pocket was one of the contributing factors to the success of the PPC.
No less was the fact that Ferris and Lou changed the shoulder angle from 16 degrees to 33 degrees and I *think* the wall of the case, when fire-formed, had less of a taper (straighter walls) all of which increased internal capacity of the case.
Aside from the fact that internal capacity increased, some were of the opinion (e.g. Boyer, Fowler, et al) that shoulder angle, in and of itself, contributed significantly to accuracy. I would like to hear your view on this matter.
I have been playing with the idea of building a 416 using the 50 BMG as the parent case. Length of the case would not change (as it did with Barrett's). Rather than shortening the case, I was considering changing the shoulder angle from 16 deg to 33 deg and possibly giving the case a wee more straighter wall. Using a bullet with a high BC and a twist rate of 1:12, I was hoping for a faster .... more accurate round with changes as mentioned above. Do you think that these changes would improve accuracy as it did with the PPC?
Harold
I rarely participate in this part of the forum but on occasions I have a few questions that need answers.
You and I (as well as Reid) have talked on more than just several occasions in the early 80's when you worked at Brownells. I was quite active in the 80's building Bench Rest rifles. I valued your opinion at that time; nothing has changed as you still have my ear.
Regarding "birth" of the PPC and its celebration for accuracy, there seemed to be several attributes of the parent case that significantly contributed to the success of the PPC. For starters, the 220 Russian had a small primer pocket when compared to the AK round. More than several tried using the 7.62 X 39 case when 220 Russian brass began to disappear. The AK parent case didn't do so well. Many were of the opinion that the small primer pocket was one of the contributing factors to the success of the PPC.
No less was the fact that Ferris and Lou changed the shoulder angle from 16 degrees to 33 degrees and I *think* the wall of the case, when fire-formed, had less of a taper (straighter walls) all of which increased internal capacity of the case.
Aside from the fact that internal capacity increased, some were of the opinion (e.g. Boyer, Fowler, et al) that shoulder angle, in and of itself, contributed significantly to accuracy. I would like to hear your view on this matter.
I have been playing with the idea of building a 416 using the 50 BMG as the parent case. Length of the case would not change (as it did with Barrett's). Rather than shortening the case, I was considering changing the shoulder angle from 16 deg to 33 deg and possibly giving the case a wee more straighter wall. Using a bullet with a high BC and a twist rate of 1:12, I was hoping for a faster .... more accurate round with changes as mentioned above. Do you think that these changes would improve accuracy as it did with the PPC?
Harold