.277 Nosler bullets, varying weights and accuracy

[Alibiiv]

L

Have you checked the accuracy of your scale?

Have you checked the accuracy of your scale?

Yes I did with the internal calibration and also against my Ohaus 505 beam scale, both read the same.

 

[xsn10s]

L


Yes I did with the internal calibration and also against my Ohaus 505 beam scale, both read the same.

I won't promise anything but when I get a chance I'll weigh the Sierra Matchkings I have. 277 135 SMK's and post them on here. It'll take awhile.

 

[Alibiiv]

I won't promise anything but when I get a chance I'll weigh the Sierra Matchkings I have. 277 135 SMK's and post them on here. It'll take awhile.

This is a great idea. The bullets that I'm measuring are from SPS, marked as "blems"?? I never thought to measure bullets from other brands. I have some Sierra and Speer heads that I can weigh. I posted this thread out of curiosity and looking for other's experience with bullet heads. Up to this point I've not paid too much attention to weight on heads and have just been seating bullets as they come out of the box, and…with pretty good results!! The longest distance that I have to shoot is 300 yards so anything after that I do not have anything to reference from.

 

[Lenny Foffa]

I check it with the Brass test weight that came with the scale. My scale is often a 1/10th of a grain off. I see this with the empty tray some times its 164.3 and other times its 164.4. I double weigh each and every powder charge. It dumps and trickles 59.5 , then beeps. I remove the pan with the powder , gently shake the pan to spread out the powder in the Pan , then weigh it again. If it then measures 59.6, I remove a 1/10 grain until it reads a steady 59.5 grns. That's is my attempt to keep the loads uniform, as best I can until I buy the Match Grade RCBS scale that is about $1000.00

 

[Muddyboots]

From Erik Cortina's bulletin Accurate Shooter:

Bullet Sorting — Bryan Litz Offers Smart Advice

At the 2015 Berger Southwest Nationals, Forum member Erik Cortina cornered Bryan Litz of Applied Ballistics. Erik, the F-Open winner in the 600-yard Mid-Range match, was curious about bullet sorting. Knowing that bullets can be sorted by many different criteria (e.g. weight, overall length, base to ogive length, actual bearing surface length etc.) Erik asked Bryan to specify the most important dimension to consider when sorting. Bryan recommended sorting by "Base to Ogive". Litz noted that: "Sorting by overall length can be misleading because of the nature of the open-tip match bullet. You might get a bullet that measures longer because it has a jagged [tip], but that bullet might not fly any different. But measuring base to ogive might indicate that the bullet is formed differently — basically it's a higher resolution measurement…."

Erik Cortina « Daily Bulletin

Content tagged with Erik Cortina. | Page 3

bulletin.accurateshooter.com

 

[xsn10s]

This is a great idea. The bullets that I'm measuring are from SPS, marked as "blems"?? I never thought to measure bullets from other brands. I have some Sierra and Speer heads that I can weigh. I posted this thread out of curiosity and looking for other's experience with bullet heads. Up to this point I've not paid too much attention to weight on heads and have just been seating bullets as they come out of the box, and…with pretty good results!! The longest distance that I have to shoot is 300 yards so anything after that I do not have anything to reference from.

Okay here's the Sierra .277 135 gr Match King weigh sort. I used my old PACT digital scale. I waited about five seconds for each weight on the scale to settle down. It's what's left of a partial box.

 

[Muddyboots]

Okay here's the Sierra .277 135 gr Match King weigh sort. I used my old PACT digital scale. I waited about five seconds for each weight on the scale to settle down. It's what's left of a partial box.

Research project: Interesting to measure CBTO and bearing surface for the weights listed. Requires 3 fingers as mental lubricant though.!