I just got back from the range and loaded up 8 (all the primers I had left) 405 gr loads. Using Lil’Gun, I started at 25.5 grs and in 1/2 increments went to 29 grs. I shot these at 100 yards. I borrowed a Chrono and here are the velocities that I got:
25.5 grs — 1387 fps
26.0 grs — 1435 fps
26.5 grs — 1498 fps
27.0 grs — 1499 fps (All three went into a 1 1/3 inch group)
27.5 grs — 1508 fps
28.5 grs — 1543 fps
29.0 grs — 1545 fps
I had no pressure signs. Primers looked OK. Sorry no Pics. This is 200 fps over the factory velocity for a Rem 405 in a 45-70. This bullet is not designed for high speed. I have shot them before in hot 45-70 loads and did have jacket separtation. Same thing happened with these. The bullet would mushroom and then split the jacket and the core would separate. Maybe a Speer 400 would work better.
I also chrono’d the 300 gr remington with 30.5 grs of Lil’gun and got 1857 fps. No jacket separation.
By the way — I also Chrono’d 240 gr hornady’s over 40.3 grs of H110 and got 200 fps variation in velocity. High was 2300 and low was 2100. Just like one of the previous posts said.
Your right about these bullets not being designed for the speeds you are at right now, to say nothing about the speeds yet to be achieved. I shoot some of these bullets out of a 458 win mag and sure enough, jacket separation is an issue. Bullet construction is always an issue. You must match the right bullet for your particular mission profile.
You might try these – http://www.castperformance.com/Categ…t=17&total=105 , (go one page up and down to see the entire line)
There are 14 bullets to choose from, 265gr-460gr, with 265gr-335gr .452” bullets. They are designed not to lead the bore at 3000fps and all are LBT flat points and the big deal is, they WILL NOT foul the Gas Tube. I wouldn’t recommend seating the middle of the bullet crimp grove to the case mouth, but seating the bullet out or short of the crimp grove (depending on your loading specifics) will do just fine. You won’t get jacket separation with these and the flat points will flatten anything you care to kill…anything/everything, period. They are shorter than the same weight copper jacket bullet (more powder) and competitively priced. The 265’s are reportedly at 2600+ fps and have killed numerous moose and two Bison that I know of, with efficient and very effective dispatch, with little (measured in mere feet) or no tracking at all. One gentleman is a shooter for the BLM and killed a bunch of cattle for them, one animal estimated at 2500lbs and reports absolutely in creditable results. Deer just don’t have a chance (Ok, a strange thing here, the non-expanding 45 cal bullets destroy way less meat than any 30 cal I ever used). Expansion is not necessary, as the Flat-Points disrupt much more tissue than an expanded bullet ever hopes too achieve and will penetrate where an expansion bullet can not venture. If you want cheap and these kinds of results, then go to 230gr ball bullets or better yet 230gr fmj flat points (I love the Hornady FMJ-FPs), and if you load SAFELY, some of you gentilmen will see 2800+fps with these. Don’t be concerned that the ball bullets will not expand, 45 cal is already a bigger diameter than a 30 cal gets after it expands, and will penetrate elephants, yes two…t
I would say not.* I admit to not having tons of experience, measured in the low four figures, with hard cast/gas checked bullets, but one time we shot 500rds and removed the gas tube for inspection and there was no tube fouling.* I have a customer that has 30+ years of shooting this style of bullet in AR’s and he, with absolutely no reservations states, that the hard cast/gas checked bullets are no problem, what so ever.* Feeding should be no problem either, as the 450b will with a great deal of reliability, not absolute, feed empty cases.Crimping?* With the lead bullets stay out of the crimping grove with the case mouth, which may mean adjusting the OAL or using a different hard cast/gas checked bullet, just stay as close to 2.250″ as possible, remember for any given load, the pressures go up the deeper the bullet is seated into the case or shorter the OAL.* For jacketed bullets, any proper made taper-crimp die cannot over crimp.* For proper ignition and to prevent any bullet travel in the case, use a heavy taper-crimp.* I personally want to see visible denting of the bullet.* Just double check your loads by removing the bolt/carrier and dropping the loaded round onto the chamber, you must hear an auditable “Thunk” when the case mouth seats against the end of the chamber.* If you don’t hear the thunk then you may have a crimp die that can over crimp (something I’ve never seen), which can give excessive head space, or the bullet has possibly caused the case to over expand (bulge) and is impeding the forward travel and preventing proper seating in the chamber.* “Carefully“, full length resize the loaded case again and that should take care of any bulge problems, be careful to clean any case lube off the cartridge, lubes in the chamber will induce excessive bolt thrust, keep those chambers dry.* Of course you could resize the bullet down a little in any of the various Luber/sizer dies (BTW – using a .451/.452 luber/sizer die and standard lubed .458 lead bullets, will lube the die just right for resizing jacketed .458 bullets down to .451 standards and you’ll end up with some really cheap lead plinking bullets to boot, just do not move them very fast or you’ll lead up the barrel.* I use one lubed lead bullet for every five jacketed bullets, there have been no jacket problems to date, heck you’re only taking the bullet down .003 per side).** If you see that your reloads do have the stated bulge do the thunk test, if you hear it, don’t fret the bulge.