Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Garandman, Killerblade, JCnSA, RSMDTX, Fortress
61103 Registered Users
Top Posters
dogcatcher 79359
stxranchman 52092
RWH24 44568
rifleman 43938
BOBO the Clown 41370
BMD 40578
Big Orn 37484
bill oxner 34508
txshntr 34077
sig226fan (Rguns.com) 30938
facebook
Forum Stats
61103 Members
46 Forums
416083 Topics
5750555 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Topic Options
#5931378 - 09/16/15 10:50 AM Different Brass and Sight Change?
Armalite260 Offline
Pro Tracker

Registered: 08/24/10
Posts: 1775
Question for the experts. Can different brass cause a noticeable point of impact? I've been using Remington brass in my 260 and changed last week to Lapua. The point of impact for the exact same load was a half in high, half inch left. I had a 4 shot group I could cover with a nickel so it wasn't me. Learn something new every day..


Edited by Armalite260 (09/16/15 10:51 AM)

Top
#5931578 - 09/16/15 12:47 PM Re: Different Brass and Sight Change? [Re: Armalite260]
ChadTRG42 Offline
THF Trophy Hunter

Registered: 09/16/09
Posts: 9906
Loc: Lewisville, TX
Yes. Specifically for the 260 Rem round, Lapua brass is heavier and a little thicker than the Rem brass, which will decrease the internal case capacity, and raise your pressures. So, you have to reduce your load to accommodate this difference in case volume. Plus, the Lapua brass has thicker necks, and has more neck tension on the bullet. Both of these items will increase your pressure when shooting Lapua brass with the Remington brass load. It still may shoot fine, but it will increase your pressures, which will increase your speed. You have picked up probably 40-50 fps or more with the Lapua brass now, when running the Rem brass load. So, just watch for pressure signs, and back your load down if you need to.

Also, as you increase your pressures and speed, the POI usually goes up as you increase your load. So the POI shift up is normal.
_________________________

www.DallasReloads.com
Type 01 and Type 06 FFL

Top
#5931818 - 09/16/15 03:45 PM Re: Different Brass and Sight Change? [Re: Armalite260]
Armalite260 Offline
Pro Tracker

Registered: 08/24/10
Posts: 1775
Chad, I cannot thank you enough for the information. I did back my load back by one full grain. I do not see any pressure issues like blown out primers, flattened or pierced primers, or more noticeable recoil. As far as that goes it appears fine. I was just scratching my head as to why the POI would go up by only changing brass.. Makes sense. Thank you again.

Top
#5931870 - 09/16/15 04:25 PM Re: Different Brass and Sight Change? [Re: Armalite260]
ChadTRG42 Offline
THF Trophy Hunter

Registered: 09/16/09
Posts: 9906
Loc: Lewisville, TX
You are very welcome!
_________________________

www.DallasReloads.com
Type 01 and Type 06 FFL

Top



© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide