Thanks, so I need to trim the meplats(tips) after I determine their Bearing Surface and disregard the weights ?
How much do I take off, and do they all need to be the same OAL?
I don't mind doing the detail work, it will be awhile before the weather is mild enough for me go out shooting.
Those that are paying attention to this detail AND winning matches are doing the above.
There is a reasonable point beyond which no noticiable improvement will be noticed. I suspect that the reasonable point progresses with distance being shot.
I'll be doing this process soon. These will be my steps:
1: Trim all bullets to the same length. (Base to meplate). Starting with the nastiest looking nose and some of the SMK points are really lopsided.
I don't think I want a meplat larger than .05, which to me is too large.
2: Not sure on this step until I try it. It will either be sort by weight or bearing surface length. The small amount of this sorting shows that overall bullet weight varies with bearing length and vise versa.
If I sort first by bearing surface length I'll then sort these by weight.
If I sort first by weight I'll sort these by bearing length.
I'll do this until it proves to me that it doesn't make any difference then I'll bag the whole idea and just go kill stuff.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!
I use mostly Bergers and have found that the slight differences in bullet weight are not enough to be of concern, so I no longer weight them. Bearing surface is another matter. It affects the time the bullet is in the barrel, and is more critical. I separate those bullets and keep any with a .003" and less variance in BS. The others are my sighters, practice bullets, etc.
I shoot 500 meter (approx. 550 yds) groundhog matches. I trim meplats for 6mm, 6.5mm and 30 cal. bullets. I have not seen any great difference at extreme ranges, but it may be an advantage to do so at longer distances. The meplats need just a slight touch to uniform them, reducing the length about a thou or two. But then, it is important to open the point slightly with a tiny inside reamer. Meplat pointing will cause a small reduction in BC. It is not necessary to trim meplats so that all will finish with exact uniform total bullet lengths.
The newest fad is bullet pointing, which I have not tried. Seems like every month or so a new "super gadget" comes along, and I am getting weary of being the sucker for all of them.
I have Kevin Cram's (Montour Co. Rifles) meplat trimmers, but others are similar. As stated above, I found no value in meplat trimming - other shooters disagree. You place a bullet in a hollow steel chamber of proper diameter, and the cap has a fluted cutter which you set to a fixed position; then twist cutter against the meplat. This reduces the meplat a few thou, hopefully so that all bullets measure the same total length. But in so doing, it flattens the hollow point. The point must be reopened, using the same chamber tool with a tiny reamer you twist and open the hollow point so that all are uniform. Here is an article and photos regarding meplat trimming.
A pointing tool, which I do not use, threads into your press similar to a sizing die. Squeezing the bullet into the pointer compresses the meplat, making it more aerodynamic. But you will need to uniform the meplats first. Here is a good article on the pointer: