.270 boat tail mould

[mikej]

I was wondering if anyone knows where i can find a boat tail mould for a .270 winchester? I've looked at the rcbs and saeco, but seem pretty flat tipped. i like shooting at 200+ yards, any reccomendations? Thanks for all the previous .270 threads contributors out there.

[lurch]

I don't think you are going to find a boat tail mold for any rifle application. You can get bevel based molds for pistol applications, but these are definitely not what I would call a boat tail. You would not be able to put a gas check on it and those are extremely useful for the majority of loads that I surmise you are going to be looking at if you want to do 200+ yard shooting.

270 molds are relatively scarce when compared to the other popular bore sizes. The "flat tipped" designs are going to shoot much better at higher velocity that a spire point. Depending on who you ask, the long unsupported section of the spire point tends to cause problems with the boolit not being truly straight going down the barrel due to a tendency to slump to one side under the high acceleration forces of a high velocity launch (high velocity being a relative term). For example, a well known 30 caliber spire point has been reported to shoot pretty well if the velocity is kept under 1700 to 1800 fps and attention is paid to how it is loaded. Loverin or bore riding designs generally do much better at velocities above this.

In short, go with the RCBS or SAECO type designs. You will be much happier.

[82nd airborne]

without the gas check your velocities are going to be limited to around 1400fps or under. that doesnt exactly let the .270 shine.

[Bret4207]

First off, welcome aboard. Second, forget the boat tail idea. For longer ranger shooting in the 270 you'll want to find a gas checked boolit of 135 or more grains. Your selection will be limited as noted, the 270 not being a real popular cast number.

If I might make a suggestion- take a fired case fired with a full bore load in that prticular rifle. Measure the inside mouth diameter and 8 chances out of 10 that's the diameter you'll find works pretty good for your boolit.

Boat tails don't work on cast because you have no gas check which limits you, normally, to 12-1400 fps.

[GabbyM]

With a 100 yard zero my RCBS 150 grain running 2350 fps. is 3.22" low at 200 yards and 8.89" low at 300 as per ballistic software. I've not shot mine that fast yet but it is doable. What I shoot so far is an easy 2,000 fps. That puts the .377 B.C. bullet 4.77" low at 200 yards and 12.75" low at 300 with the 100 yard zero. Which I like because my simple mind can stay oriented to where my scope is set.
500 yard shooting at known target distance is doable. With a 45 inch drop and 40 inches drift in a ten mph cross wind. You are still super sonic with 1219 fps from the 2000 fps muzzle velocity. That is all with my 750 ft. altitude and 75F temp.

[Bret4207]

Gabby brings up a good point- cast isn't inferior to jacketed per se, even at longer ranges. It's just different. You have to make allowances. Same with the guys that demand a 300 Superwhizbangmagnum shooting a BT Blackdeath bullet. Yes, they get 300 fps more than a 30-06 and the drift and drop is a little less. But if they learn their rifle it's not all that big a difference. Just gotta make allowances.

[Three-Fifty-Seven]

Here is the RCBS 270-150
http://i153.photobucket.com/albums/s220/ShawnTVT/Guns/4.jpg

I have not shot it yet, I'm still waiting on my checkmaker . . . hope to run it up to about 2500 fps . . . time will tell.

[lurch]

... Yes, they get 300 fps more than a 30-06 and the drift and drop is a little less. But if they learn their rifle it's not all that big a difference. Just gotta make allowances.

Like a technicolor shoulder... A regular full house '06 is plenty for me shooting from the bench.

But the bit about making allowances is so true. Know what you've got and what it does and you'll be 2 steps ahead of the game.

[stephen perry]

If you can get one read Mann's book 'the Bullets Flight' about jacketed and Cast bullets. Flat base bullets at 200 do as well whether jacketed or Cast.

Stephen Perry
Angeles BR

[mikej]

thanks all for the posts. I may just try out the rcbs 150 after all. That makes sense about the boat tail not working in cast. I really like this caliber and want to keep shooting it, so i appreciate the responses. I'll check through the old posts to see what powders are popular on this round.