BCL102 Range Review, SECOND RANGE TRIP POST 123!!!
- Thread starter Jay
- Start date
- Location
- Fort St John B.C.
sorry i missed that..... most of the guys here are putting ar15 triggers in the rifle, although the rra national match has a lightened hammer and lightened spring.... in my opinion that is not suitable for a 308, i wonder if the recoil was big enough to be essentially "doubling" the rifle, because the hammer is following the carrier before its in battery, maybe enough mass being forced back to trip the sear after it has engaged the hammer... but before the carrier is in battery.
either way, i assume it was purchased from questar, i would return it for exchange or contact rra and get it exchanged
Looks like a solid performance! Good shooting SBe! and thank for posting his pics Ljones.
Next time you take her out... shoot some 5 to 10-5 round groups or 5 to 10-10 round groups. Don't change anything as you shoot.
IMHO - The key to accurate assessment of rifle ability to perform is long term testing. Having a rifle that shots 1 MOA or less.... once, when the stars were momentarily aligned in the sky is a bit of a joke. Especially if nine other groups are ranging in size from 2'' to 4''.
Next time you take her out... shoot some 5 to 10-5 round groups or 5 to 10-10 round groups. Don't change anything as you shoot.
IMHO - The key to accurate assessment of rifle ability to perform is long term testing. Having a rifle that shots 1 MOA or less.... once, when the stars were momentarily aligned in the sky is a bit of a joke. Especially if nine other groups are ranging in size from 2'' to 4''.
https://www.canadiangunnutz.com/forum/showthread.php/1606274-308-semi-accuracy-comparison
Keep an eye here for good starting points for loads. Hopefully we'll start to see some range updates late September with load data.
Basically though with a 308 semi you want to do service rifle loads (my Hornady manual has a section for them) and use powders with a similar burn rate to H4895 and Varget for 308 semi's. Also I would suggest keeping projectile weights above 140gr and below 180gr. Your rifle may cycle and you may see nice results on a target with heavier ones but the heavier the projectile the harder/faster the BCG cycles which is harder on your rifle.
I have a Larue OBR and my general observation on it and other semi auto AR .308 rifles is that anything beyond 3 round groups causes the barrel to heat up and the groups to open up. The barrel profile is actually quite thin. But shooting a bunch of 3 round groups with 15 minutes between each group, it is sub MOA consistently. Rounds 4,5,6,etc usually open up to the 1.5 MOA range. You may have similar experiences.
I'm sure the usual complaints will be mentioned about 3 round groups being statistically invalid. However, shooting 3 round groups 10 times and getting the average (not cherry picking the best ones) should give you a strong indication of accuracy with a given load. I'd love to see if something similar happens with the 102 rifles.
I'm sure the usual complaints will be mentioned about 3 round groups being statistically invalid. However, shooting 3 round groups 10 times and getting the average (not cherry picking the best ones) should give you a strong indication of accuracy with a given load. I'd love to see if something similar happens with the 102 rifles.
LuckyLuc82
CGN Ultra frequent flyer
- Location
- Rockwood, Ontario
I don't mean to be rude but everyone I've seen is getting consistent .75 to 1.5 groups, where are your numbers coming from???
Nah CHAS. I will be doing 5 round groups kuz this ammo is expensive and I only have a limited amount.
Just poking around on federals website does anyone know anything about this new 308 Win. Edge TLR™?
175gr .536 BAC 2600fps muzzle.
" • Match-grade long-range accuracy in a bonded hunting bullet
• High-performance polymer tip material provides the industry's highest heat resistance for the most consistent ballistics
• Extremely high ballistic coefficient
• Exclusive Slipstream™ tip helps flatten trajectories and initiate low-velocity expansion
• Less wind drift and drop
• AccuChannel™ groove technology minimizes drag
• Copper shank and bonded lead core retain weight for deep penetration at any range
• Demonstrated expansion at 900 yards"
175gr .536 BAC 2600fps muzzle.
" • Match-grade long-range accuracy in a bonded hunting bullet
• High-performance polymer tip material provides the industry's highest heat resistance for the most consistent ballistics
• Extremely high ballistic coefficient
• Exclusive Slipstream™ tip helps flatten trajectories and initiate low-velocity expansion
• Less wind drift and drop
• AccuChannel™ groove technology minimizes drag
• Copper shank and bonded lead core retain weight for deep penetration at any range
• Demonstrated expansion at 900 yards"
GreenBob, I think Jerry says it best. The rifle is showing promise with factory fodder & ball. Here is what Jerry said:
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Your observations are indeed correct... not really anything to do with contour as much as it has to do with quality of barrel. Most factory barrels are of moderate/low quality wrt to manf and stress relieving. Heat will cause warpage which leads to POI shift and even changes in load tuning.
Proper match barrels are stress relieved (to varying degrees) which can them very stable even when hot. Some manfs do this better then others.
My FTR rifles (308 win chamber) have to stay stable for as many as 30rds when shot on a summer weekend. ... screaming hot barrels. Stable enough to put that last rd into a 5" circle at 1000yds
My Rem 783 PRS type rifle has a heavy sporter contour McGowen prefit... 2 mags and the last shot will drop a bullet on a MOA rock at 1450yds. I am going to start testing some CarbonSix barrels when weather allows. First time out was very promising.
Better AR match barrels from Shilen and Krieger are accurate and stable even when they get hot. 6rds is no biggie for a well made barrel. Many stages in US high power shooting require many more shots and still hit the center at extended distances.
As you have suggested, test your barrel and note where each shot goes. Barrels that warp will follow a pattern as they heat up. As long as you keep the rd count below this temp, you can find out what the mechanical accuracy of your system is. I will do multiple 3 or 4 rds groups to confirm the tuning and accuracy of a factory barrel that warps with heat. 3 or 4 groups will give you an average of what the true accuracy is.
However, if your task needs more rds then what is stable, consider changing to a better barrel.
Jerry
I would re-word your statement slightly to say that an adjustable gas block is the best improvement you can invest in for a poorly setup rifle. If your rifle is not overgassed they are useless unless you want to shoot loads outside the typical operating range your rifle was designed to work with. I will agree that they are nice to have so you can fine tune your rifle for the load you are shooting but the average shooter running surplus or other cheap ammo does not need one.
You can add an adjustable gas block but they don't come with the rifle and most people won't be buying one. Plus it's hard to load heavy/long projectiles to fit the magazine anyway, and in order to take advantage of the long/heavy projectiles with increased BC you need to be shooting 500+ yards, less than that you will have just as good of results with a 150gr-168gr projectile.
Look into the SLR Rifleworks adjustable gas block, they make them in 0.625", 0.750", 0.875", and 0.936" and can be imported. I think someone said the 102 has a 0.875" saddle but I can not confirm if that is accurate or not.
https://www.slrrifleworks.com/
The solution is to load one round at a time and shoot one shot every 3-5 minutes, I say load one at a time so your next cartridge doesn't get warmed up by sitting in the warm chamber and also so air can circulate through the barrel between shots aiding in cooling. This is only practical during load testing though, once you find the load your barrel likes you shoot more rapidly to see how consistent it is as it warms up. As Jerry said, most factory barrels are not stress relieved as well as a high end barrel so you will see your POI shift as the barrel warms up.
Yes, a three round group is much less informative in regards to showing consistency than a five or 10 round group. You can shoot them as slowly as you want as long as they are all shot consecutively.
This is why I've started using a chronograph during load testing, even when the barrel warms up and the POI starts drifting, finding a load with a very small extreme spread in velocity will usually reward you with good results on paper if you keep the barrel cool and you do your part behind the trigger. I don't use the chronograph to find the fastest load, only the most consistent load.
http://www.accuracy-tech.com/tag/accuracytech-reloading-method/
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