270wbymag vs 270wsm

D

double_d

Beginner
Dec 30, 2011
99
1
Well, for those that have been following the Speer 150gr deepcurl bullet test thread



the first battle will be with Retumbo

1. because I have some :)
2. QL seemed to show it using all of the case capacity that was available.

I will say that the WSM was a much more compressed load than the WBY...I will not be able to get to the range until Monday but will post the results of Round 1 asap
 
Case volume wins, but other factors tip the scale in favour of the WSM for me. Availability and cost of brass are two major factors that wilt the situation toward the WSM. Also, general availability of rifles chambered in the WSM must be factored in. The 270WBY is a fine cartridge, however.
 
You got my attention here. I shoot a .270 bee and a 270 win. Please post loads, bullets, powder, primer. I am really curious to see the results. I like to compare the 270 win to the 270 bee at the range shooting 130 grain bullets pushed to the limit. All 3 of the .270 cartridges a person can't go wrong with!

LT
 
Laker_Taker":1ailynjl said:
You got my attention here. I shoot a .270 bee and a 270 win. Please post loads, bullets, powder, primer. I am really curious to see the results. I like to compare the 270 win to the 270 bee at the range shooting 130 grain bullets pushed to the limit. All 3 of the .270 cartridges a person can't go wrong with!

LT
Click to expand...

So true. The .270 is a great round no matter which flavor!
 
Laker_Taker":2okbem5u said:
You got my attention here. I shoot a .270 bee and a 270 win. Please post loads, bullets, powder, primer. I am really curious to see the results. I like to compare the 270 win to the 270 bee at the range shooting 130 grain bullets pushed to the limit. All 3 of the .270 cartridges a person can't go wrong with!

LT
Click to expand...

We are mixing metaphors here? Last time I checked, we had three calibers in this discussion (.270 Win, .270 WSM and .270 Wea). Each poster seems to take two, compare, and leave the third out. They are all fine calibers and I have a great deal of respect for all of their respective niches in the course of things.

Laker Taker, part of the process of getting to know your rifle and the calibers which you chosse to use for your specific purposes are integral to the learning process of optimizing your particular set of circumstances and hunting conditions that you prefer and employ under your local conditions and game needs.

The first thing that I did, when I got back into reloading after a few years, was to buy copies of several older reloading manuals that I no onger had and add about another (4) new manuals to that stack for reading and reference before I ever loaded a single bullet.

I read and note every different loading for each caliber which I use from all members here who post their data. I do it if for no other reason than to be aware that this particular powder may help me in some way in the future as a substitute or replacement someday. However, each of us has to do our own load development (or have it done for them) in order to control the process to the accuracy and process control level which most gun loonies require. For that reason, I seldom exactly match any of the others here with my loads.

By seaching this site, you will find much data on the various .270 calibers and their performance in many different platforms. I would start there.
 
This should be interesting, for sure. I'd have to say that in my experience, Retumbo is not the most ideal powder for either round, but at least it's a level (if not ideal) playing field. If the laws of physics hold together, which I have no doubt they will, the 270Wby should be the "winner" by 50-100fps, even in a 24" barrel. The case capacity is the key, as Dr. Mike already indicated. The only way a smaller case gets higher velocity for the same bullet, in the same barrel, is to generate higher pressure. Since both rounds are set for the same SAAMI spec as far as max pressure is concerned, it should be academic which should win the velocity race. What would be interesting is to do this with about 10,000 different barrels, half chambered in one, half in the other, to try to create a statistically significant result. But who has 10,000 barrels laying around?
 
Great caliber the 277 :) I don't think that there would be much more than 300 to 400fps speed difference between the 3 of them. Out to 300 yards I don't think you see a noticeable change, after that I believe is when you would see the benefit of the extra speed.
For me I normally don't shoot at big game at a much further distance than 300 yards but have on a few occasions :wink:
I would likely take the WSM just as it would be easier to load for, than the Bee around here. I have never seen someone shooting that particular caliber. Most guys shooting bees are using the bigger stuff and I know one person that shoots the 257 bee.

Blessings,
Dan
 
Me too Dan, I don't hunt or shoot at much over 300 yards now anyway. On deer sized game, the .270 Win and 130 Nosler Partitions have worked well for me since I got this rifle in 1973. I also have a 7mm Mag, so the next step up in power is already there to use if needed.
 
Dr mike i agree that the bee loses out in availability of factory chambering in other rifle manufactures, i always belived that weatherby should offer their bee's in vangaurd lines, they would sell like hot cakes just like the 257 has done. :)
 
It's a pity that the 270 WBY isn't chambered in some of the more affordable rifles. It would prove to be quite popular, I should think.
 
Being the winner of a .277 shootout..... is akin to being champion of a sorority house pillow fight.....


But hey..... who doesn't like a good sorority house pillow fight?
 
I always liked the 270 Weatherby but the price of brass kept me from getting one. Years ago I had a chance at getting a LH Fibermark but didn't, that was one that shouldn't have gotten away. I guess you could make brass from 264 WM or 7mm RM and use only the good stuff for hunting. I do agree that some more affordable guns should be available for it.
 
I really like the .270 Weatherby, because it makes ammo and brass for my .270WSM seem like a bargain! And the belt on its case makes the .270 WSM look modern and practical.
 
Be aware, guys, that Weatherby now makes 270Wby ammo which can be bought for about $35-40 per box. That's in line with just about every 270WSM box of ammo I've seen. And, you get fine Weatherby (by Norma) brass to reload, versus the RemWinFed brass you get with your 270WSM ammo. Long term, the 'bee is a better bargain, for sure.

Oh, and 2ndtimer, the belt apparently adds 100fps or more to the bullet! It's a good trade!
 
First let me say this is just a quick and FUN comparison.....between one old school and one new school .277. It is in no way scientific, and doesn't mean much.

I have always read that the Weatherby beats the WSM because it has a 26" tube, my particular WBY came with a 24" pipe, so I thought I would see how they stack up.

This very quick test also shows how you must be careful with data, and proceed with caution......

My plan was to work up to the listed max from the quickload posted by DrMike which was 74.9 for the WBY and 73.4 for the WSM, both showed ~ 107% of the case capacity using Retumbo and the 150gr deepcurl.

I started running into pressure signs with the WSM well below the 73.4gr mark (at about 71.3gr), and just showed very slight pressure signs at the listed WBY max of 74.9.

I think the WBY could handle another grain or two....

Here are the results of the Retumbo test-----

WSM with 71.3gr = 3128fps

WBY with 74.9gr = 3071fps

Accuracy with both was acceptable, the WSM just under and 1" and the WBY just over 1"

I will try and do another powder test in the next few days.
 
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