Shopdog
posted this
23 August 2020
Re: lube amounts;
Less is more(velocity) has been my experience. I call it the "big 6" but it's given name is 6mm Remington,or 6mmR for short. It's been the attention for the last cpl months here.
Using a brandy new,only had one cast on it,Saeco 6mm 85g mould. It's a truncated cone with a tapered nose,bore ride section. Recorded all the #'s on the dropped bullets and CRS but,they are pretty durn spot on. GC gets a "dip" in the Lyman H die,just far enough that it gets crimped,no deeper. A quick roll/spin size cleaning each edge of the single lube groove leaves a knurl as the telltale after the trimming result of this OP. One of these days will make a video for utube on this process. Have taken and posted many pics on other sites,can't on this one,and won't on others. But the knurls really hold lube,just like 22 RF and "swaged" 38 WC's..... they're rolled to form the knurls too.
I went through the load tests with H4895.... right about where the pressure started to open up groups.... switched to IMR4350. Usually interjecting Varget in before the 4350 but supply is dwindling on Varget. Then,ran 4350 with a wee bit of dacron up until starting JB loads with the 85g,dropping the dacron. Accuracy picked up a tiny bit at this point but was back to pressure upsetting the bullet too much.
Now,am at the 40+ grains of 4350 and just recently changed gears again to IMR4831. Each change of powder speed brings more velocity at lower pressure. Oh,it's a little(lot) more to it but now to the point;
Lube was only applied to the tiny spot above GC..... but,after loading and QC checking,I add LLA to the nose and knurling on the exposed part of bullet. One medium coat,no more,none less. I can't speak if it's making any difference on accuracy because.... not gonna change to a different lube. Honestly,there's so little it ain't worth it it. The accuracy isn't "bughole" yet but is pretty good.
The LLA does make a noticeable difference though. But is hard to pin down mainly because of the burn rate shifts in powder. Each "shift" sees sorta the same action though.
An initial drop in pressure,LLA not as needed. But go up the scale with that powder and the LLA will maintain acc a touch longer. I reckon you could view it as a pressure enabler? Just like powder character changes with space/time/pressure,me thinks LLA does as well. One reason it,and more conventional lubed for that matter ...... can work for one guy,fail with the next. So LLA could be replaced with BLL or some other wipe on. You just have to pay attention.
I shoot almost every week day. Weekends are for other stuff. Sorry for the ramblings,y'all have a great day.
Errgh 
