Found a node with varget and fgmm brass. I've purchased some new lapua brass. Do I need to add/increase powder charge or just load and go? Sorry if its been asked and answered before I couldn't find anything. Thanks in advance, Jeff.
switching brass brands question
- Thread starter jeff1383
- Start date
Re: switching brass brands question
Brass is variable between manufacturers. It is best to work up loads when making a major change in components especially if you're near or at maximum pressure. Weight the brass and check internal water volume. If the new brass is lighter and has more volume it would be safe to load up five rounds as a test before committing to the load combo. If the brass is heavier or has less internal volume then you could easily get a pressure spike.
Brass is variable between manufacturers. It is best to work up loads when making a major change in components especially if you're near or at maximum pressure. Weight the brass and check internal water volume. If the new brass is lighter and has more volume it would be safe to load up five rounds as a test before committing to the load combo. If the brass is heavier or has less internal volume then you could easily get a pressure spike.
Re: switching brass brands question
I've found FGMM and Lapua to be comparable, but wouldn't use a load worked up in one brand of brass in the other without starting at least 0.5 grains lower and working back up. Besides what was already stated about pressure differences due to volume you may find you're outside the node you had found. The only way to know is to try, but be careful.
I've found FGMM and Lapua to be comparable, but wouldn't use a load worked up in one brand of brass in the other without starting at least 0.5 grains lower and working back up. Besides what was already stated about pressure differences due to volume you may find you're outside the node you had found. The only way to know is to try, but be careful.
Re: switching brass brands question
I would maybe drop down a grain or two and then work back up to the load you use now and maybe a grain above it running them through your chrono watching for pressure signs and waiting until you get the same velocity as your old node.
I would maybe drop down a grain or two and then work back up to the load you use now and maybe a grain above it running them through your chrono watching for pressure signs and waiting until you get the same velocity as your old node.
Re: switching brass brands question
work up a new load for the different brands of brass, it sucks but that is the only way to be sure.
work up a new load for the different brands of brass, it sucks but that is the only way to be sure.
Re: switching brass brands question
dump the powder in and scrape it off with a butter knife. then seat the bullets.
dump the powder in and scrape it off with a butter knife. then seat the bullets.
Re: switching brass brands question
Get ten fired cases from each batch of FGMM and Lapua. Then measure their case capacity in grains of water. Average the measurements of the batches by case brand, FFMM and Lapua. If the case capacity is similar, you should get similar results....
Get ten fired cases from each batch of FGMM and Lapua. Then measure their case capacity in grains of water. Average the measurements of the batches by case brand, FFMM and Lapua. If the case capacity is similar, you should get similar results....
Re: switching brass brands question
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
Tried that...twice...never works
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
Tried that...twice...never works
Re: switching brass brands question
If you have a chronograph, then reduce your load by say 1 grain and work up to the velocity you had with the other brand brass. When you've matched the velocity, you've matched the load. Accuracy and point of impact should be the same and the two lots of ammo should be interchangeable.
Some people say this doesn't work, but it works for me every time.
If you have a chronograph, then reduce your load by say 1 grain and work up to the velocity you had with the other brand brass. When you've matched the velocity, you've matched the load. Accuracy and point of impact should be the same and the two lots of ammo should be interchangeable.
Some people say this doesn't work, but it works for me every time.
Re: switching brass brands question
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
make sure you are drinking a stella while doing that
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
make sure you are drinking a stella while doing that
Re: switching brass brands question
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Psubond</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
make sure you are drinking a stella while doing that </div></div>
Stella is for ladyboys....I'll be drinking old spice and brut straight from the bottle
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Psubond</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jig Stick</div><div class="ubbcode-body">dump the powder in and scrape it off with a butter knife. then seat the bullets. </div></div>
make sure you are drinking a stella while doing that </div></div>
Stella is for ladyboys....I'll be drinking old spice and brut straight from the bottle
