Reloading 270 Winchester 135 Grain Cast Lead Bullet Using Lee's Mold & Gas Check

[Get-The-Lead-Out]

I have already purchased the following: Lee's 4-die set as well as the .278 bullet resizing die for the 270. The Lee 135 grain 2-bullet mold that leaves the reduction around the base of the bullet for a gas check. I have a little over 100 once-fired brass cases that so far have only been decapped and tumbled with corn cob. 1,000 Winchester rifle primers. 2lbs of IMR 4064 smokeless powder and I also got a good deal on 1,000 Hornady gas checks for 30.00.
The wheel weight lead was tested several times and got consistent results of 16 Brinell hardness but I wasn't sure if this hardness was plenty or if I should water quench the bullets when they come out of the mold. I also seen where some people were having to use something called a "buffer" whereby it was used to fill up the empty space between the powder and the bullet thus keeping the powder packed snugly for a better burn rate. I was also looking for information on applying gas checks when also going to powder coat the bullets even though I was told that gas checks aren't necessary if I'm going to powder coat the bullets...well I paid 30,00 for them and so they are going to get used up ;)
Any help would be appreciated...I haven't found ANY videos on youtube for casting bullets and reloading them for the .270

[JWT]

I just started tryout on a 270 with a NOE 160gr boolit in a 1950 Steyr Mannlicher. I am using a Hornady gas check, Lyman moly lube, CCI primers, and IMR4895. The alloy is 2.22%Sn, 2.21%Sb, 0.18%As, and 95.38%Pb air cooled. I have fired about 25 rounds with no leading, but the accuracy is not good. I think there is an issue with the scope or mount.

[44magLeo]

The actual caliber may have some quirks particular to the caliber but generally what works for one works for another. So watch all the you-tube video's you want.
You will learn some that way and lots by doing.
Try things one way, if it works fine, if not try another.
If you want to use a "buffer" use it from the start, don't work up the load then add the buffer.
Most don't find it needed.
Leo

[BCB]

A Model 700 that I won in a gun raffle, I decided to devote it to strictly cast boolits…

I have shot the following boolits: NOE-279-124-FP (~128 grains), Lyman 280642 (~150 grains), and the Lyman 287346 (Sized to 0.278…~135 grains). I tried several others with no success at all. I didn’t even keep records on them…

I used 14 different powders from the fast burner Trail Boss to the slow burner 5010-PD…

Trail Boss, Unique, and XMP-5744 gave the best results with all the boolits mentioned at velocities from 1667 fps to 1810 fps. Trail Boss and XMP-5744 gave good accuracy for 3 different loads each and Unique was only good with 1 load. I pushed all of them to a bit over 2000 fps, but the accuracy just was not there. It appears, at least in the Model 700, velocities in the range listed above worked the best…

I think the 27 caliber might be a bit fussy and there doesn’t seem to be much data on it, at least not the books I have although Lyman does list a limited number of loads for the ≤136 grainers…

Overall, I think the 150 grain boolit shoots the best. I have several 10-shot groups at 100 yards that are ~1.25”. Now then, that is not every time!!! But, 12-ounce beer cans are dead at 150 yards with good consistency…

Good-luck…BCB