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> New 270 question
New 270 question
@ 02:49 pm (GMT) |
Robert McLeanHello all,Bought a new gun, custom 270 win that I just could not resist. the gun was set up for sheep hunting now decided he wants a 300 WM. Lilje barrel, remington action bedded, trued, really nice trigger and chambered for nosler 150 accubonds. Getting 3000+ ft/sec. Does .25 groups at 100 yrds off a fancy rest. The gun came with 50 rounds built. It has 50 shots down the barrel so far. The only thing I wonder about is that it was chambered specifically to shoot nosler accubond 150 with specific load. The rounds have an COAL is 3.43", 59.8 gr of H4831sc, so i am asuming long throat. Should I worry that it will be hard to make anything else work to the same level? Nosler bullets are pricy, and I like to range shoot alot. I ordered a bullet comparitor and some accubonds to figure out some things. I have not tried to do anything in the barrel or otherwise to find the lands never had a gun like this so I am a bit gentle with it so far. Have not mounted my scope yet. I know the name of the gunsmith here in alberta that did it, think I am going to contact him and ask some questions while it is fresh, like chamber specs, maybe diagrams. What would you want to know? On another note, I bought 60 Norma White Tail 130s for set up and brass, they were on sale 20%, they look pretty short next to the AB 150s. I measured weight , length, and concentricity and the are incredibly consistant. Overall 60 centricity averaged 3.08 thou, .25" from the case. Many 1s and only two 6's and one 8. Not bad for a $2 round. Should I worry about what looks to me to be about .2 inch jump if the ABs are .01 off the lands? Seems like Evil Knevel jumping the grand canyon. Anyway reading looking through the reloading book to see what I should be looking at. |
Replies
@ 07:58 am (GMT) |
Nathan FosterRe: New 270 questionHi Rob, whatever the case, it will be nice to have this platform to work off.3.53" on the lands (3.43" with .010 jump) is OK. Similar to rifles of old. You can see that the case neck is very long, more than necessary. While it is good to seat to the bottom of the neck, there are some designs / situations where this is just too much jump. The 7x57 can be similar, loaded with modern projectiles. Its OK to seat out a bit, provided you still have a full caliber in the case neck. If the BT / bullet body is sitting out a wee bit, the key will be to watch for donuts with successive reloads. You can still shoot other bullets, but you'll need to ditch brass eventually after a firm donut forms. You could perhaps try using a bushing die, partially neck sizing as a means to minimizing working at that point. So basically, while it is set up for one particular bullet, there is no reason why you cannot experiment with others. The ABLR is a good choice for general hunting if you get into larger body weights. But if reaching right out, the softer 150gr SST is an option. I would avoid using the 145gr ELD-X as this lacks the cannelure of the SST which helps to control expansion if hunting larger bodied animals. Light weight bullets in the .270 can be spectacular but they can also let you down on larger body weights. By the same token, one cannot load truly heavy weight bullets in the .270. There are some new heavy weights, but these are for the fast twist Western and are also unfortunately stoutly constructed. The 150 grain weight is as good as it gets in the .270 Win. All I would say in addition to this, is to match construction to your hunting practices (methods / expected ranges). The load suggested to you is of course several grains over book max. Don't try starting this high in Norma brass unless this was the same brass used in the original load. The chamber print would be good to have. From this, you can determine whether it has the original Brenneke style half degree leade (starting wide at case mouth and immediately but gradually tapering) or whether it is a custom design with a parallel freebore followed by a 1.5 degree leade angle. I quite often hear from readers that they have had their rifles custom throated / please help with load work, only to find (after reading the print and checking OAL's) that the specs they wanted were actually standard specs and that nothing was actually customized. Hope that helps a bit. All the best. |
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@ 10:55 am (GMT) |
Robert McLeanRe: New 270 questionThank you for the reply. I will see if I can get a print . The brass is Nosler. Definitely need to get more info about the chamber. Need to buy 270 dies that will do it justice. Hope my Lee classic cast press is up to it. Need to get my sightron on it and get out.I am not hunting these days, just punching paper for fun. I lost my hunting partner to age and we just arent eating the meat. The fact is that the animals have wasting desease more and more here is a concern. It's a real problem here across all the different species in alberta. I enjoy building the ammo so i think i will jump down that rabbit hole, and i think it will be target shooting until my grandson gets a bit older. I will start with a few less grains for sure Always had a sweet spot for a 270, my grand dads caliber. There is an old man at the range who can do 5 touching with his 308 at 200 on his fancy rest, I just want to do that off a pack with what I learned from here about how. Maybe even get to the 600 yard range with a decent chance at a good group. Having this gun has made me feel like getting it to it again. The gun was for sale for a while bit of an ugly duckling to some I think. I think first because it is a 270 and second because it has a funky candy cane style fluted stainless 24" #4 barrel. Nice simple micmillan stock, 6lbs 9ozs. Picked it up for way less than it would cost me to build. Maybe got too excited about the groups I saw but it lit my fire again. Rob |
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